CN110346314A - The rapid detection method of micro chromium content in a kind of steel - Google Patents
The rapid detection method of micro chromium content in a kind of steel Download PDFInfo
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- CN110346314A CN110346314A CN201910744485.8A CN201910744485A CN110346314A CN 110346314 A CN110346314 A CN 110346314A CN 201910744485 A CN201910744485 A CN 201910744485A CN 110346314 A CN110346314 A CN 110346314A
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- 239000011651 chromium Substances 0.000 title claims abstract description 139
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 135
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 121
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 55
- 239000010959 steel Substances 0.000 title claims abstract description 55
- 238000001514 detection method Methods 0.000 title claims abstract description 48
- 238000011161 development Methods 0.000 claims abstract description 81
- 239000012086 standard solution Substances 0.000 claims abstract description 75
- 239000007788 liquid Substances 0.000 claims abstract description 72
- 238000002835 absorbance Methods 0.000 claims abstract description 54
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 36
- KSPIHGBHKVISFI-UHFFFAOYSA-N Diphenylcarbazide Chemical compound C=1C=CC=CC=1NNC(=O)NNC1=CC=CC=C1 KSPIHGBHKVISFI-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012085 test solution Substances 0.000 claims description 72
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 67
- 229910001868 water Inorganic materials 0.000 claims description 67
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 54
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 27
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims description 24
- 239000012286 potassium permanganate Substances 0.000 claims description 22
- 239000003153 chemical reaction reagent Substances 0.000 claims description 21
- 244000061458 Solanum melongena Species 0.000 claims description 20
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 14
- 229910017604 nitric acid Inorganic materials 0.000 claims description 14
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 12
- 239000004202 carbamide Substances 0.000 claims description 12
- 235000010288 sodium nitrite Nutrition 0.000 claims description 12
- 238000004090 dissolution Methods 0.000 claims description 11
- 230000007071 enzymatic hydrolysis Effects 0.000 claims description 10
- 238000006047 enzymatic hydrolysis reaction Methods 0.000 claims description 10
- 238000011017 operating method Methods 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 238000004364 calculation method Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 abstract description 6
- 235000019504 cigarettes Nutrition 0.000 abstract description 5
- 238000009628 steelmaking Methods 0.000 abstract description 5
- 241001062472 Stokellia anisodon Species 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 3
- 238000010561 standard procedure Methods 0.000 abstract description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 10
- 239000012452 mother liquor Substances 0.000 description 10
- 230000008033 biological extinction Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 9
- 238000006396 nitration reaction Methods 0.000 description 9
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 8
- 229910052700 potassium Inorganic materials 0.000 description 8
- 239000011591 potassium Substances 0.000 description 8
- 239000000243 solution Substances 0.000 description 8
- 238000009835 boiling Methods 0.000 description 7
- 238000005553 drilling Methods 0.000 description 6
- 238000001035 drying Methods 0.000 description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 description 5
- 238000005303 weighing Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 238000004448 titration Methods 0.000 description 4
- 229910000712 Boron steel Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000005261 decarburization Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000003918 potentiometric titration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- Spectroscopy & Molecular Physics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The present invention relates to a kind of rapid detection methods of micro chromium content in steel, belong to chromium content detection method technical field.It is easily splashed and detection time length to emit sulfuric acid cigarette when solving the problems, such as existing national standard method dissolved samples, the present invention provides a kind of rapid detection methods of micro chromium content in steel, draw standard curve including sample treatment, diphenylcarbazide colour developing, with the absorbance of chromium standard solution, measure the absorbance of sample color development treatment liquid and substitute into micro chromium content in standard curve calculating steel.Rapid detection method of the present invention changes dissolved samples method, has both been able to satisfy the accuracy of inspection result, moreover it is possible to eliminate the security risk in detection process；This invention simplifies detecting steps not only to shorten round of visits without filtering, but also saves testing cost.Detection method provided by the invention has preferable stability, is applied to steelmaking technical field, can smelt steel grade standard sample in time for stokehold and carry out definite value, plays the role of for stokehold steel-making guiding.
Description
Technical field
The invention belongs to a kind of quick detections of micro chromium content in chromium content detection method technical field more particularly to steel
Method.
Background technique
Currently, the measuring method of chromium content mainly uses GB/T233.11-2008 " visual titration or electricity in steel and alloy
Position titration " " steel and alloy analysis method sodium carbonate separate-diphenylcarbazide luminosity with GB/T233.12-1991
Method measures chromium content ".
The content of chromium, can only survey in GB/T233.11-2008 " visual titration or potentiometric titration " measurement steel and alloy
Steel and alloy of the chromium content 0.1% or more are tried, when chromium content is less than 0.1%, test result deviation is larger, and the party
The valuableness of reagent price needed for method, complex steps, time are long, and titration end-point is not easy to control.And GB/T233.12-1991 " steel and
Alloy analysis method sodium carbonate separation-diphenylcarbazide Spectrophotometric Determination of Chromium amount " sample to be tested dissolution after send out sulfuric acid
Cigarette easily splashes, and has not only extended analytical cycle but also has been easy to hurt sb.'s feelings, there are security risks；And potassium permanganate oxygen is separated using sodium carbonate
A large amount of precipitatings are generated after change, then are filtered, it is more and sticky due to precipitating, so filter cycle is longer, it is not able to satisfy big life
Production demand.
Summary of the invention
It is grown to emit sulfuric acid cigarette when solving the problems, such as existing national standard method dissolved samples and easily splashing with detection time, the present invention mentions
A kind of rapid detection method of micro chromium content in steel is supplied.
Technical solution of the present invention:
The rapid detection method of micro chromium content, includes the following steps: in a kind of steel
Step 1: sample treatment:
0.1000-0.2000g sample is weighed, is added what 20mL was prepared according to a certain volume by sulfuric acid, phosphoric acid, nitric acid and water
Nitration mixture dissolves by heating sample, sends out film after sample dissolution completely, observe to smolder to remove and be cooled to room temperature system, add
Salt in the water-soluble enzymatic hydrolysis system of 50mL, it is in stable aubergine that potassium permanganate to system is added dropwise after system is boiled, and continues to boil
It is cooled to room temperature after 2min, system is settled to 100mL and obtains test solution；
Step 2: colour developing:
It takes the conduct point of 10mL test solution to take test solution, the aubergines of 10mL urea, 5~6 drop sodium nitrite to potassium permanganate is added to take off
It goes, adds water to 70mL, add 10mL phosphoric acid, 3mL diphenylcarbazide is settled to 100mL with water and shakes even；
Step 3: drawing standard curve:
It pipettes different volumes chromium standard solution to be respectively placed in 100mL volumetric flask, by step 2 operating method to DIFFERENT Cr
The standard solution of content carries out color development treatment, then the standard solution of different chromium contents is obtained with water constant volume, to be not added with chromium mark
The blank color development treatment liquid of quasi- solution is reference, and the absorbance of each standard solution color development treatment liquid is measured under 540nm wavelength, with
The absorbance of each standard solution color development treatment liquid is ordinate, and each standard solution institute's chrome content is abscissa, draws standard curve；
Step 4: calculating micro chromium content in steel:
Using water as reference, measure that treated point takes the extinction of test solution color development treatment liquid through step 2 under 540nm wavelength
Degree, while the absorbance of the color development treatment liquid for sample blank reagent of not adding an examination of is measured, divide and the absorbance of test solution color development treatment liquid is taken to subtract
The absorbance resulting value of color development treatment liquid of sample blank reagent of going not add an examination of substitutes into the standard curve that step 3 is drawn, and is calculated
The chromium content of sample.
Further, the volume ratio of sulfuric acid, phosphoric acid described in step 1, nitric acid and water is 4:3:1:23；The wherein sulfuric acid
Mass concentration be 1.84g/mL, the mass concentration of phosphoric acid is 1.69g/mL, and the mass concentration of nitric acid is 1.42g/mL.
Further, the mass concentration of potassium permanganate described in step 1 is 40g/L.
Further, the mass concentration of urea described in step 2 is 50g/L, and the mass concentration of the sodium nitrite is 5g/
L。
Further, the volumetric concentration of phosphoric acid described in step 2 is 50%；The mass concentration of the diphenylcarbazide is
2.5g/L。
Further, the concentration of chromium standard solution described in step 3 is 2 μ g/mL.
Further, chromium standard solution described in step 3 be added volumetric flask amount be respectively as follows: 1.00mL, 2.00mL,
4.00mL, 7.00mL and 10.00mL.
Further, the chromium content detection range of standard curve described in step 3 is 0.005%~0.5%.
Further, the calculation formula of chromium content described in step 4 are as follows: Cr%=[(m1×V)/(m×V1)]×100；Formula
In: m1: the chromium content checked in from standard curve, g；M: sample size, g；V: test solution total volume, mL；V1: divide and takes test solution volume, mL.
Beneficial effects of the present invention:
The rapid detection method of micro chromium content changes dissolved samples method in a kind of steel provided by the invention, is both able to satisfy
The accuracy of inspection result, moreover it is possible to eliminate the security risk in detection process；With constant volume after potassium permanganate oxidation, sodium carbonate is not had to
Separation, does not precipitate generation, without filtering, not only shortens round of visits, but also save testing cost.
Detection method provided by the invention has preferable stability, using standard sample as analysis sample and standard value
It compares, within the scope of tolerance, greatly shortens detection cycle, micro addition chromium content is in 0.005%-0.5% in completion steel
Quick analysis, can in time for stokehold smelt steel grade standard sample carry out definite value, for stokehold steel-making play the role of it is guiding.
Detailed description of the invention
Fig. 1 is the standard curve that embodiment 5- embodiment 8 is drawn according to the chromium content and absorbance of chromium standard solution.
Specific embodiment
Below with reference to embodiment, the following further describes the technical solution of the present invention, and however, it is not limited to this, all right
Technical solution of the present invention is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be contained
Lid is within the protection scope of the present invention.
Embodiment 1
The rapid detection method of micro chromium content, includes the following steps: in a kind of steel
Step 1: sample treatment:
0.1000-0.2000g sample is weighed, is added what 20mL was prepared according to a certain volume by sulfuric acid, phosphoric acid, nitric acid and water
Nitration mixture dissolves by heating sample, sends out film after sample dissolution completely, observe to smolder to remove and be cooled to room temperature system, add
Salt in the water-soluble enzymatic hydrolysis system of 50mL, it is in stable aubergine that potassium permanganate to system is added dropwise after system is boiled, and continues to boil
It is cooled to room temperature after 2min, system is settled to 100mL and obtains test solution；
Step 2: colour developing:
It takes the conduct point of 10mL test solution to take test solution, the aubergines of 10mL urea, 5~6 drop sodium nitrite to potassium permanganate is added to take off
It goes, adds water to 70mL, add 10mL phosphoric acid, 3mL diphenylcarbazide is settled to 100mL with water and shakes even；
Step 3: drawing standard curve:
It pipettes different volumes chromium standard solution to be respectively placed in 100mL volumetric flask, by step 2 operating method to DIFFERENT Cr
The standard solution of content carries out color development treatment, then the standard solution of different chromium contents is obtained with water constant volume, to be not added with chromium mark
The blank color development treatment liquid of quasi- solution is reference, and the absorbance of each standard solution color development treatment liquid is measured under 540nm wavelength, with
The absorbance of each standard solution color development treatment liquid is ordinate, and each standard solution institute's chrome content is abscissa, draws standard curve；
Step 4: calculating micro chromium content in steel:
Using water as reference, measure that treated point takes the extinction of test solution color development treatment liquid through step 2 under 540nm wavelength
Degree, while the absorbance of the color development treatment liquid for sample blank reagent of not adding an examination of is measured, divide and the absorbance of test solution color development treatment liquid is taken to subtract
The absorbance resulting value of color development treatment liquid of sample blank reagent of going not add an examination of substitutes into the standard curve that step 3 is drawn, and is calculated
The chromium content of sample.
Embodiment 2
The rapid detection method of micro chromium content, includes the following steps: in a kind of steel
Step 1: sample treatment:
It weighs 0.1000-0.2000g sample to be placed in 250mL conical flask, it is 1.84g/mL that 20mL, which is added, by mass concentration
Sulfuric acid, mass concentration be 1.69g/mL phosphoric acid, mass concentration be 1.42g/mL nitric acid and water 4:3:1:23 by volume
The nitration mixture of preparation, being heated to 40~90 DEG C makes dissolved samples, sends out film after sample dissolution completely, observes to smolder and remove body
System is cooled to room temperature, and adds the salt in the water-soluble enzymatic hydrolysis system of 50mL, and potassium permanganate is added dropwise after system is boiled to system in stable
Aubergine continues to be cooled to room temperature after boiling 2min, system is settled to 100mL and obtains test solution；
Step 2: colour developing:
It takes the conduct point of 10mL test solution to take test solution, the aubergines of 10mL urea, 5~6 drop sodium nitrite to potassium permanganate is added to take off
It goes, adds water to 70mL, add 10mL phosphoric acid, 3mL diphenylcarbazide is settled to 100mL with water and shakes even；
Step 3: drawing standard curve:
It pipettes different volumes chromium standard solution to be respectively placed in 100mL volumetric flask, by step 2 operating method to DIFFERENT Cr
The standard solution of content carries out color development treatment, then the standard solution of different chromium contents is obtained with water constant volume, to be not added with chromium mark
The blank color development treatment liquid of quasi- solution is reference, and the absorbance of each standard solution color development treatment liquid is measured under 540nm wavelength, with
The absorbance of each standard solution color development treatment liquid is ordinate, and each standard solution institute's chrome content is abscissa, draws standard curve；
Step 4: calculating micro chromium content in steel:
Using water as reference, measure that treated point takes the extinction of test solution color development treatment liquid through step 2 under 540nm wavelength
Degree, while the absorbance of the color development treatment liquid for sample blank reagent of not adding an examination of is measured, divide and the absorbance of test solution color development treatment liquid is taken to subtract
The absorbance resulting value of color development treatment liquid of sample blank reagent of going not add an examination of substitutes into the standard curve that step 3 is drawn, and is calculated
The chromium content of sample.
Hair sulfuric acid cigarette is changed to hair phosphoric acid cigarette in the case where not impact analysis result by the present embodiment, solves security risk,
With constant volume after potassium permanganate oxidation, do not have to sodium carbonate and separate, do not precipitate generation, without filtering, guarantees result accuracy
Under the conditions of not only shorten round of visits, but also save inspection cost.Since ingredient is single in general steel, noiseless element, therefore this implementation
Also the requirement of analysis precision is able to satisfy while example Simplified analysis step.
Embodiment 3
The rapid detection method of micro chromium content, includes the following steps: in a kind of steel
Step 1: sample treatment:
It weighs 0.1000-0.2000g sample to be placed in 250mL conical flask, it is 1.84g/mL that 20mL, which is added, by mass concentration
Sulfuric acid, mass concentration be 1.69g/mL phosphoric acid, mass concentration be 1.42g/mL nitric acid and water 4:3:1:23 by volume
The nitration mixture of preparation, being heated to 40~90 DEG C makes dissolved samples, sends out film after sample dissolution completely, observes to smolder and remove body
System is cooled to room temperature, and adds the salt in the water-soluble enzymatic hydrolysis system of 50mL, and the permanganic acid that mass concentration is 40g/L is added dropwise after system is boiled
Potassium to system is in stable aubergine, continues to be cooled to room temperature after boiling 2min, system is settled to 100mL and obtains test solution；
Step 2: colour developing:
It takes 10mL test solution as point test solution is taken, adds the drop mass concentration of urea, 5~6 that 10mL mass concentration is 50g/L to be
The aubergine of the sodium nitrite of 5g/L to potassium permanganate is taken off, and 70mL is added water to, and adding 10mL volumetric concentration is 50% phosphoric acid,
3mL mass concentration is the diphenylcarbazide of 2.5g/L, is settled to 100mL with water and shakes even；
Step 3: drawing standard curve:
It pipettes different volumes chromium standard solution to be respectively placed in 100mL volumetric flask, by step 2 operating method to DIFFERENT Cr
The standard solution of content carries out color development treatment, then the standard solution of different chromium contents is obtained with water constant volume, to be not added with chromium mark
The blank color development treatment liquid of quasi- solution is reference, and the absorbance of each standard solution color development treatment liquid is measured under 540nm wavelength, with
The absorbance of each standard solution color development treatment liquid is ordinate, and each standard solution institute's chrome content is abscissa, draws standard curve；
Step 4: calculating micro chromium content in steel:
Using water as reference, measure that treated point takes the extinction of test solution color development treatment liquid through step 2 under 540nm wavelength
Degree, while the absorbance of the color development treatment liquid for sample blank reagent of not adding an examination of is measured, divide and the absorbance of test solution color development treatment liquid is taken to subtract
The absorbance resulting value of color development treatment liquid of sample blank reagent of going not add an examination of substitutes into the standard curve that step 3 is drawn, and is calculated
The chromium content of sample.
Embodiment 4
The rapid detection method of micro chromium content, includes the following steps: in a kind of steel
Step 1: sample treatment:
It weighs 0.1000-0.2000g sample to be placed in 250mL conical flask, it is 1.84g/mL that 20mL, which is added, by mass concentration
Sulfuric acid, the phosphoric acid that mass concentration is 1.69g/mL, the nitric acid that mass concentration is 1.42 g/mL and water 4:3:1 by volume:
23 nitration mixture prepared, being heated to 40~90 DEG C makes dissolved samples, sends out film after sample dissolution completely, observe smolder remove by
System is cooled to room temperature, and adds the salt in the water-soluble enzymatic hydrolysis system of 50mL, and the Gao Meng that mass concentration is 40g/L is added dropwise after system is boiled
Sour potassium to system is in stable aubergine, continues to be cooled to room temperature after boiling 2min, system is settled to 100mL and obtains test solution；
Step 2: colour developing:
It takes 10mL test solution as point test solution is taken, adds the drop mass concentration of urea, 5~6 that 10mL mass concentration is 50g/L to be
The aubergine of the sodium nitrite of 5g/L to potassium permanganate is taken off, and 70mL is added water to, and adding 10mL volumetric concentration is 50% phosphoric acid,
3mL mass concentration is the diphenylcarbazide of 2.5g/L, is settled to 100mL with water and shakes even；
Step 3: drawing standard curve:
It prepares chromium standard solution: weighing 0.2829g and moved into after 150 DEG C of potassium bichromates that drying to constant weight are dissolved in water in advance
In 1000mL volumetric flask, the mother liquor of 100 μ g/mL is obtained with water constant volume；20mL mother liquor is taken to be placed in 1000mL volumetric flask, it is fixed with water
Appearance obtains the chromium standard solution of 2 μ g/mL.
It pipettes 1.00mL, 2.00mL, 4.00mL, 7.00mL and 10.00mL chromium standard solution and is respectively placed in 100mL volumetric flask
In, color development treatment is carried out by standard solution of the step 2 operating method to different chromium contents, DIFFERENT Cr is then obtained with water constant volume
The standard solution of content measures each mark using the blank color development treatment liquid for being not added with chromium standard solution as reference under 540nm wavelength
The absorbance of quasi- test solution color development treatment liquid, using the absorbance of each standard solution color development treatment liquid as ordinate, each standard solution institute
Chrome content is abscissa, draws standard curve, and the chromium content detection range of the standard curve is 0.005%~0.5%；
Step 4: calculating micro chromium content in steel:
Using water as reference, measure that treated point takes the extinction of test solution color development treatment liquid through step 2 under 540nm wavelength
Degree, while the absorbance of the color development treatment liquid for sample blank reagent of not adding an examination of is measured, divide and the absorbance of test solution color development treatment liquid is taken to subtract
The absorbance resulting value of color development treatment liquid of sample blank reagent of going not add an examination of substitutes into the standard curve that step 3 is drawn, and is calculated
The chromium content of sample.
Embodiment 5
The rapid detection method of micro chromium content, includes the following steps: in a kind of steel
Step 1: sample treatment:
It weighs 0.1000-0.2000g sample to be placed in 250mL conical flask, it is 1.84g/mL that 20mL, which is added, by mass concentration
Sulfuric acid, the phosphoric acid that mass concentration is 1.69g/mL, the nitric acid that mass concentration is 1.42 g/mL and water 4:3:1 by volume:
23 nitration mixture prepared, being heated to 40~90 DEG C makes dissolved samples, sends out film after sample dissolution completely, observe smolder remove by
System is cooled to room temperature, and adds the salt in the water-soluble enzymatic hydrolysis system of 50mL, and the Gao Meng that mass concentration is 40g/L is added dropwise after system is boiled
Sour potassium to system is in stable aubergine, continues to be cooled to room temperature after boiling 2min, system is settled to 100mL and obtains test solution；
Step 2: colour developing:
It takes 10mL test solution as point test solution is taken, adds the drop mass concentration of urea, 5~6 that 10mL mass concentration is 50g/L to be
The aubergine of the sodium nitrite of 5g/L to potassium permanganate is taken off, and 70mL is added water to, and adding 10mL volumetric concentration is 50% phosphoric acid,
3mL mass concentration is the diphenylcarbazide of 2.5g/L, is settled to 100mL with water and shakes even；
Step 3: drawing standard curve:
It prepares chromium standard solution: weighing 0.2829g and moved into after 150 DEG C of potassium bichromates that drying to constant weight are dissolved in water in advance
In 1000mL volumetric flask, the mother liquor of 100 μ g/mL is obtained with water constant volume；20mL mother liquor is taken to be placed in 1000mL volumetric flask, it is fixed with water
Appearance obtains the chromium standard solution of 2 μ g/mL.
It pipettes 1.00mL, 2.00mL, 4.00mL, 7.00mL and 10.00mL chromium standard solution and is respectively placed in 100mL volumetric flask
In, color development treatment is carried out by standard solution of the step 2 operating method to different chromium contents, DIFFERENT Cr is then obtained with water constant volume
The standard solution of content measures each mark using the blank color development treatment liquid for being not added with chromium standard solution as reference under 540nm wavelength
The absorbance of quasi- test solution color development treatment liquid, using the absorbance of each standard solution color development treatment liquid as ordinate, each standard solution institute
Chrome content is abscissa, draw standard curve as shown in Figure 1, the chromium content detection range of the standard curve is 0.005%~
0.5%；
Step 4: calculating micro chromium content in steel:
Using water as reference, measure that treated point takes the extinction of test solution color development treatment liquid through step 2 under 540nm wavelength
Degree, while the absorbance of the color development treatment liquid for sample blank reagent of not adding an examination of is measured, divide and the absorbance of test solution color development treatment liquid is taken to subtract
The absorbance resulting value of color development treatment liquid of sample blank reagent of going not add an examination of substitutes into the standard curve that step 3 is drawn and obtains point taking
Institute's chrome content in test solution, the chromium content of sample is calculated with following formula:
Cr%=[(m1×V)/(m×V1)]×100；In formula:
m1: the chromium content checked in from standard curve, g；
M: sample size, g；
V: test solution total volume, mL；
V1: divide and takes test solution volume, mL.
The tolerance of the present embodiment detection method:
Repeatability limit r:lgr=-1.5589+0.6552lgm
Reproducibility limits R:lgR=-1.3721+0.6245lgm
M is the average value of two measured values, % in formula.
Under the conditions of repeatability, the absolute difference of the result of independent test twice of acquisition is not more than repeatability limit (r).
Under the conditions of reproducibility, the absolute difference of the result of independent test twice of acquisition is no more than repeatability limit (R).
Detection method provided in this embodiment is compared as analysis sample with standard value using standard sample, in tolerance model
In enclosing, round of visits is greatly shortened, test of many times confirms that detection method provided in this embodiment has preferable stability.
Embodiment 6
The rapid detection method for present embodiments providing micro chromium content in a kind of steel grade 15MnTi, includes the following steps:
Step 1: sample treatment:
Steel grade 15MnTi sample is drilled through, sample position surface polishing treatment should be subjected to before drilling through, prevent iron oxide
Skin enters in sample；Sample after drilling through, it is desirable that for it is oil-free, anhydrous, without decarburization, uniform strip crumbs shape.
0.1000g sample is weighed to be placed in 250mL conical flask, be added 20mL by mass concentration be 1.84g/mL sulfuric acid,
4:3:1:23 is prepared phosphoric acid, the nitric acid that mass concentration is 1.42 g/mL and the water that mass concentration is 1.69g/mL by volume
Nitration mixture, being heated to 40 DEG C makes dissolved samples, sends out film after sample dissolution completely, observes to smolder to remove system is cooled to room
Temperature adds the salt in the water-soluble enzymatic hydrolysis system of 50mL, and potassium permanganate to the system that mass concentration is 40g/L is added dropwise after system is boiled and is in
Stable aubergine continues to be cooled to room temperature after boiling 2min, system is settled to 100mL and obtains test solution；
Step 2: colour developing:
The conduct point of 10mL test solution is taken to take test solution, adding the drop mass concentration of urea, 6 that 10mL mass concentration is 50g/L is 5g/L
The aubergine of sodium nitrite to potassium permanganate take off, add water to 70mL, adding 10mL volumetric concentration is 50% phosphoric acid, 3mL matter
The diphenylcarbazide that concentration is 2.5g/L is measured, 100mL is settled to water and is shaken even；
Step 3: drawing standard curve:
It prepares chromium standard solution: weighing 0.2829g and moved into after 150 DEG C of potassium bichromates that drying to constant weight are dissolved in water in advance
In 1000mL volumetric flask, the mother liquor of 100 μ g/mL is obtained with water constant volume；20mL mother liquor is taken to be placed in 1000mL volumetric flask, it is fixed with water
Appearance obtains the chromium standard solution of 2 μ g/mL.
It pipettes 1.00mL, 2.00mL, 4.00mL, 7.00mL and 10.00mL chromium standard solution and is respectively placed in 100mL volumetric flask
In, color development treatment is carried out by standard solution of the step 2 operating method to different chromium contents, DIFFERENT Cr is then obtained with water constant volume
The standard solution of content measures each mark using the blank color development treatment liquid for being not added with chromium standard solution as reference under 540nm wavelength
The absorbance of quasi- test solution color development treatment liquid, using the absorbance of each standard solution color development treatment liquid as ordinate, each standard solution institute
Chrome content is abscissa, draw standard curve as shown in Figure 1, the standard curve chromium content detection range be 0.005%~
0.5%；
Step 4: calculating micro chromium content in steel:
Using water as reference, measure that treated point takes the extinction of test solution color development treatment liquid through step 2 under 540nm wavelength
Degree, while the absorbance of the color development treatment liquid for sample blank reagent of not adding an examination of is measured, divide and the absorbance of test solution color development treatment liquid is taken to subtract
The absorbance resulting value of color development treatment liquid of sample blank reagent of going not add an examination of is 0.294, is substituted into the standard that step 3 is drawn
It is 10.6 μ g that curve, which obtains point taking institute's chrome content in test solution, and the chromium content of sample is calculated with following formula:
Cr%=[(m1×V)/(m×V1)]×100；In formula:
m1: the chromium content checked in from standard curve, g；
M: sample size, g；
V: test solution total volume, mL；
V1: divide and takes test solution volume, mL.
Cr%=[(m1×V)/(m×V1)] × 100=10.6 × 10-6× 100mL/0.1000g × 10mL=
0.106%.
Embodiment 7
The rapid detection method for present embodiments providing micro chromium content in a kind of steel grade boron steel, includes the following steps:
Step 1: sample treatment:
Steel grade boron steel sample is drilled through, sample position surface polishing treatment should be subjected to before drilling through, prevent iron scale
Into in sample；Sample after drilling through, it is desirable that for it is oil-free, anhydrous, without decarburization, uniform strip crumbs shape.
0.1000g sample is weighed to be placed in 250mL conical flask, be added 20mL by mass concentration be 1.84g/mL sulfuric acid,
4:3:1:23 is prepared phosphoric acid, the nitric acid that mass concentration is 1.42 g/mL and the water that mass concentration is 1.69g/mL by volume
Nitration mixture, being heated to 40 DEG C makes dissolved samples, sends out film after sample dissolution completely, observes to smolder to remove system is cooled to room
Temperature adds the salt in the water-soluble enzymatic hydrolysis system of 50mL, and potassium permanganate to the system that mass concentration is 40g/L is added dropwise after system is boiled and is in
Stable aubergine continues to be cooled to room temperature after boiling 2min, system is settled to 100mL and obtains test solution；
Step 2: colour developing:
The conduct point of 10mL test solution is taken to take test solution, adding the drop mass concentration of urea, 6 that 10mL mass concentration is 50g/L is 5g/L
The aubergine of sodium nitrite to potassium permanganate take off, add water to 70mL, adding 10mL volumetric concentration is 50% phosphoric acid, 3mL matter
The diphenylcarbazide that concentration is 2.5g/L is measured, 100mL is settled to water and is shaken even；
Step 3: drawing standard curve:
It prepares chromium standard solution: weighing 0.2829g and moved into after 150 DEG C of potassium bichromates that drying to constant weight are dissolved in water in advance
In 1000mL volumetric flask, the mother liquor of 100 μ g/mL is obtained with water constant volume；20mL mother liquor is taken to be placed in 1000mL volumetric flask, it is fixed with water
Appearance obtains the chromium standard solution of 2 μ g/mL.
It pipettes 1.00mL, 2.00mL, 4.00mL, 7.00mL and 10.00mL chromium standard solution and is respectively placed in 100mL volumetric flask
In, color development treatment is carried out by standard solution of the step 2 operating method to different chromium contents, DIFFERENT Cr is then obtained with water constant volume
The standard solution of content measures each mark using the blank color development treatment liquid for being not added with chromium standard solution as reference under 540nm wavelength
The absorbance of quasi- test solution color development treatment liquid, using the absorbance of each standard solution color development treatment liquid as ordinate, each standard solution institute
Chrome content is abscissa, draw standard curve as shown in Figure 1, the standard curve chromium content detection range be 0.005%~
0.5%；
Step 4: calculating micro chromium content in steel:
Using water as reference, measure that treated point takes the extinction of test solution color development treatment liquid through step 2 under 540nm wavelength
Degree, while the absorbance of the color development treatment liquid for sample blank reagent of not adding an examination of is measured, divide and the absorbance of test solution color development treatment liquid is taken to subtract
The absorbance resulting value of color development treatment liquid of sample blank reagent of going not add an examination of is 0.408, is substituted into the standard that step 3 is drawn
It is 14.9 μ g that curve, which obtains point taking institute's chrome content in test solution, and the chromium content of sample is calculated with following formula:
Cr%=[(m1×V)/(m×V1)]×100；In formula:
m1: the chromium content checked in from standard curve, g；
M: sample size, g；
V: test solution total volume, mL；
V1: divide and takes test solution volume, mL.
Cr%=[(m1×V)/(m×V1)] × 100=14.9 × 10-6× 100mL/0.1000 × 10mL=0.149%.
Embodiment 8
A kind of rapid detection method of micro chromium content in steel grade carbon colorimetric steel is present embodiments provided, including is walked as follows
It is rapid:
Step 1: sample treatment:
Steel grade carbon colorimetric steel curved beam is drilled through, sample position should be subjected to surface polishing treatment, anti-block before drilling through
Change iron sheet to enter in sample；Sample after drilling through, it is desirable that for it is oil-free, anhydrous, without decarburization, uniform strip crumbs shape.
0.1000g sample is weighed to be placed in 250mL conical flask, be added 20mL by mass concentration be 1.84g/mL sulfuric acid,
4:3:1:23 is prepared phosphoric acid, the nitric acid that mass concentration is 1.42 g/mL and the water that mass concentration is 1.69g/mL by volume
Nitration mixture, being heated to 40 DEG C makes dissolved samples, sends out film after sample dissolution completely, observes to smolder to remove system is cooled to room
Temperature adds the salt in the water-soluble enzymatic hydrolysis system of 50mL, and potassium permanganate to the system that mass concentration is 40g/L is added dropwise after system is boiled and is in
Stable aubergine continues to be cooled to room temperature after boiling 2min, system is settled to 100mL and obtains test solution；
Step 2: colour developing:
The conduct point of 10mL test solution is taken to take test solution, adding the drop mass concentration of urea, 6 that 10mL mass concentration is 50g/L is 5g/L
The aubergine of sodium nitrite to potassium permanganate take off, add water to 70mL, adding 10mL volumetric concentration is 50% phosphoric acid, 3mL matter
The diphenylcarbazide that concentration is 2.5g/L is measured, 100mL is settled to water and is shaken even；
Step 3: drawing standard curve:
It prepares chromium standard solution: weighing 0.2829g and moved into after 150 DEG C of potassium bichromates that drying to constant weight are dissolved in water in advance
In 1000mL volumetric flask, the mother liquor of 100 μ g/mL is obtained with water constant volume；20mL mother liquor is taken to be placed in 1000mL volumetric flask, it is fixed with water
Appearance obtains the chromium standard solution of 2 μ g/mL.
It pipettes 1.00mL, 2.00mL, 4.00mL, 7.00mL and 10.00mL chromium standard solution and is respectively placed in 100mL volumetric flask
In, color development treatment is carried out by standard solution of the step 2 operating method to different chromium contents, DIFFERENT Cr is then obtained with water constant volume
The standard solution of content measures each mark using the blank color development treatment liquid for being not added with chromium standard solution as reference under 540nm wavelength
The absorbance of quasi- test solution color development treatment liquid, using the absorbance of each standard solution color development treatment liquid as ordinate, each standard solution institute
Chrome content is abscissa, draw standard curve as shown in Figure 1, the standard curve chromium content detection range be 0.005%~
0.5%；
Step 4: calculating micro chromium content in steel:
Using water as reference, measure that treated point takes the extinction of test solution color development treatment liquid through step 2 under 540nm wavelength
Degree, while the absorbance of the color development treatment liquid for sample blank reagent of not adding an examination of is measured, divide and the absorbance of test solution color development treatment liquid is taken to subtract
The absorbance resulting value of color development treatment liquid of sample blank reagent of going not add an examination of is 0.270, is substituted into the standard that step 3 is drawn
It is 9.7 μ g that curve, which obtains point taking institute's chrome content in test solution, and the chromium content of sample is calculated with following formula:
Cr%=[(m1×V)/(m×V1)]×100；In formula:
m1: the chromium content checked in from standard curve, g；
M: sample size, g；
V: test solution total volume, mL；
V1: divide and takes test solution volume, mL.
Cr%=[(m1×V)/(m×V1)] × 100=9.7 × 10-6× 100mL/0.1000g × 10mL=0.097%.
The accuracy comparing result of the rapid detection method of micro chromium content is as shown in table 1 in embodiment 6-8 steel:
Table 1
| Number | Steel grade | Standard value % | Assay value % | Difference % | National standard allows reproducibility | Accuracy |
| Embodiment 6 | 15MnTi | 0.100 | 0.106 | 0.006 | 0.0101 | It is qualified |
| Embodiment 7 | Boron steel | 0.156 | 0.149 | 0.007 | 0.0131 | It is qualified |
| Embodiment 8 | Carbon colorimetric steel | 0.093 | 0.097 | 0.004 | 0.0096 | It is qualified |
It can be seen from 1 comparing result of table in steel provided by the invention the rapid detection method of micro chromium content for not
With the detection accuracy all with higher and reproducibility of trace chromium in steel grade, it is applied to steelmaking technical field, Neng Gouji
When be accurately stokehold smelt steel grade standard sample carry out definite value, for stokehold steel-making play the role of it is guiding.
Claims (9)
1. the rapid detection method of micro chromium content in a kind of steel, which comprises the steps of:
Step 1: sample treatment:
0.1000-0.2000g sample is weighed, 20mL is added and is mixed by what sulfuric acid, phosphoric acid, nitric acid and water were prepared according to a certain volume
Acid dissolves by heating sample, sends out film after sample dissolution completely, observe to smolder to remove and be cooled to room temperature system, add 50mL
Salt in water-soluble enzymatic hydrolysis system, it is in stable aubergine that potassium permanganate to system is added dropwise after system is boiled, and continues to boil 2min
After be cooled to room temperature, system is settled to 100mL and obtains test solution；
Step 2: colour developing:
It takes the conduct point of 10mL test solution to take test solution, adds the aubergines of 10mL urea, 5~6 drop sodium nitrite to potassium permanganate to take off, add
Water adds 10mL phosphoric acid, 3mL diphenylcarbazide is settled to 100mL with water and shakes even to 70mL；
Step 3: drawing standard curve:
It pipettes different volumes chromium standard solution to be respectively placed in 100mL volumetric flask, by step 2 operating method to different chromium contents
Standard solution carry out color development treatment, the standard solution of different chromium contents is then obtained with water constant volume, it is molten to be not added with chromium standard
The blank color development treatment liquid of liquid is reference, measures the absorbance of each standard solution color development treatment liquid, under 540nm wavelength with each mark
The absorbance of quasi- test solution color development treatment liquid is ordinate, and each standard solution institute's chrome content is abscissa, draws standard curve；
Step 4: calculating micro chromium content in steel:
Using water as reference, measure that treated point takes the absorbance of test solution color development treatment liquid through step 2 under 540nm wavelength, together
When measurement do not add an examination of sample blank reagent color development treatment liquid absorbance, point take the absorbance of test solution color development treatment liquid subtract plus
The absorbance resulting value of the color development treatment liquid of sample blank reagent substitutes into the standard curve that step 3 is drawn, and sample is calculated
Chromium content.
2. according to claim 1 in a kind of steel micro chromium content rapid detection method, which is characterized in that described in step 1
Sulfuric acid, phosphoric acid, nitric acid and water volume ratio be 4:3:1:23；Wherein the mass concentration of the sulfuric acid is 1.84g/mL, phosphoric acid
Mass concentration is 1.69g/mL, and the mass concentration of nitric acid is 1.42g/mL.
3. the rapid detection method of micro chromium content in a kind of steel according to claim 1 or claim 2, which is characterized in that step 1
The mass concentration of the potassium permanganate is 40g/L.
4. according to claim 3 in a kind of steel micro chromium content rapid detection method, which is characterized in that described in step 2
The mass concentration of urea is 50g/L, and the mass concentration of the sodium nitrite is 5g/L.
5. according to claim 4 in a kind of steel micro chromium content rapid detection method, which is characterized in that described in step 2
The volumetric concentration of phosphoric acid is 50%；The mass concentration of the diphenylcarbazide is 2.5g/L.
6. according to claim 5 in a kind of steel micro chromium content rapid detection method, which is characterized in that described in step 3
The concentration of chromium standard solution is 2 μ g/mL.
7. according to claim 6 in a kind of steel micro chromium content rapid detection method, which is characterized in that described in step 3
The amount that volumetric flask is added in chromium standard solution is respectively as follows: 1.00mL, 2.00mL, 4.00mL, 7.00mL and 10.00mL.
8. according to claim 7 in a kind of steel micro chromium content rapid detection method, which is characterized in that described in step 3
The chromium content detection range of standard curve is 0.005%~0.5%.
9. according to claim 8 in a kind of steel micro chromium content rapid detection method, which is characterized in that described in step 4
The calculation formula of chromium content are as follows: Cr%=[(m1×V)/(m×V1)]×100；In formula: m1: the chromium content checked in from standard curve,
g；M: sample size, g；V: test solution total volume, mL；V1: divide and takes test solution volume, mL.
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| CN110954383A (en) * | 2019-12-16 | 2020-04-03 | 湖南众鑫新材料科技股份有限公司 | Method for measuring chromium content in vanadium-aluminum alloy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1803839C (en) * | 1990-11-29 | 1993-03-23 | Химический факультет МГУ им.М.В.Ломоносова | Method for chromium determination |
| JP2008157865A (en) * | 2006-12-26 | 2008-07-10 | Toyota Motor Corp | Analysis method of hexavalent chromium |
| CN106596529A (en) * | 2016-11-16 | 2017-04-26 | 郑洪均 | Method for rapidly detecting content of chromium in furniture factory wastewater |
| CN107436290A (en) * | 2017-09-26 | 2017-12-05 | 商洛天野高新材料有限公司 | The assay method of chromium content in a kind of vananum |
-
2019
- 2019-08-13 CN CN201910744485.8A patent/CN110346314A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1803839C (en) * | 1990-11-29 | 1993-03-23 | Химический факультет МГУ им.М.В.Ломоносова | Method for chromium determination |
| JP2008157865A (en) * | 2006-12-26 | 2008-07-10 | Toyota Motor Corp | Analysis method of hexavalent chromium |
| CN106596529A (en) * | 2016-11-16 | 2017-04-26 | 郑洪均 | Method for rapidly detecting content of chromium in furniture factory wastewater |
| CN107436290A (en) * | 2017-09-26 | 2017-12-05 | 商洛天野高新材料有限公司 | The assay method of chromium content in a kind of vananum |
Non-Patent Citations (5)
| Title |
|---|
| 上海进出口商品检验局: "《进出口商品检验方法 矿产品、铁类金属、有色金属及其合金分册》", 30 April 1991, 上海科学普及出版社 * |
| 机械工业理化检验人员技术培训和资格鉴定委员会 等: "《金属材料化学分析》", 30 June 2015, 科学普及出版社 * |
| 李宽亮 等: "《理化分析测试指南 金属材料部分 有色金属合金分析分册》", 31 December 1993, 兵器工业出版社 * |
| 李宽亮: "《理化分析测试指南 金属材料部分（钢铁化学分析分册）》", 31 December 1985, 李宽亮 * |
| 能源部西安热工研究所: "《热工技术手册电厂金属（6）》", 30 November 1989, 水利电力出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110954383A (en) * | 2019-12-16 | 2020-04-03 | 湖南众鑫新材料科技股份有限公司 | Method for measuring chromium content in vanadium-aluminum alloy |
| CN110954383B (en) * | 2019-12-16 | 2022-03-22 | 湖南众鑫新材料科技股份有限公司 | Method for measuring chromium content in vanadium-aluminum alloy |
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