CN109142344A - A kind of method and device of field quick detection dispersion total Iron in Drinking Water content - Google Patents
A kind of method and device of field quick detection dispersion total Iron in Drinking Water content Download PDFInfo
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- CN109142344A CN109142344A CN201811091143.2A CN201811091143A CN109142344A CN 109142344 A CN109142344 A CN 109142344A CN 201811091143 A CN201811091143 A CN 201811091143A CN 109142344 A CN109142344 A CN 109142344A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 33
- 239000003651 drinking water Substances 0.000 title claims abstract description 30
- 235000020188 drinking water Nutrition 0.000 title claims abstract description 30
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000006185 dispersion Substances 0.000 title description 18
- 239000000243 solution Substances 0.000 claims abstract description 72
- BHZOKUMUHVTPBX-UHFFFAOYSA-M sodium acetic acid acetate Chemical compound [Na+].CC(O)=O.CC([O-])=O BHZOKUMUHVTPBX-UHFFFAOYSA-M 0.000 claims abstract description 25
- 239000007974 sodium acetate buffer Substances 0.000 claims abstract description 23
- 238000002360 preparation method Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 66
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 29
- 229910001448 ferrous ion Inorganic materials 0.000 claims description 27
- 230000029087 digestion Effects 0.000 claims description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 claims description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 11
- 239000012086 standard solution Substances 0.000 claims description 10
- 239000011550 stock solution Substances 0.000 claims description 8
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 7
- 239000001632 sodium acetate Substances 0.000 claims description 7
- 235000017281 sodium acetate Nutrition 0.000 claims description 7
- 229960005070 ascorbic acid Drugs 0.000 claims description 6
- 235000010323 ascorbic acid Nutrition 0.000 claims description 6
- 239000011668 ascorbic acid Substances 0.000 claims description 6
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 229960000583 acetic acid Drugs 0.000 claims description 5
- 239000012362 glacial acetic acid Substances 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 239000007853 buffer solution Substances 0.000 claims 2
- MQLVWQSVRZVNIP-UHFFFAOYSA-L ferrous ammonium sulfate hexahydrate Chemical compound [NH4+].[NH4+].O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O MQLVWQSVRZVNIP-UHFFFAOYSA-L 0.000 claims 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims 1
- YBCVMFKXIKNREZ-UHFFFAOYSA-N acoh acetic acid Chemical compound CC(O)=O.CC(O)=O YBCVMFKXIKNREZ-UHFFFAOYSA-N 0.000 claims 1
- 229910052708 sodium Inorganic materials 0.000 claims 1
- 239000011734 sodium Substances 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 2
- HAUGRYOERYOXHX-UHFFFAOYSA-N Alloxazine Chemical compound C1=CC=C2N=C(C(=O)NC(=O)N3)C3=NC2=C1 HAUGRYOERYOXHX-UHFFFAOYSA-N 0.000 description 10
- 230000004308 accommodation Effects 0.000 description 8
- YNPNZTXNASCQKK-UHFFFAOYSA-N Phenanthrene Natural products C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
- 206010061307 Neck deformity Diseases 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 235000003891 ferrous sulphate Nutrition 0.000 description 2
- 239000011790 ferrous sulphate Substances 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 238000009616 inductively coupled plasma Methods 0.000 description 2
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 2
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 102000016938 Catalase Human genes 0.000 description 1
- 108010053835 Catalase Proteins 0.000 description 1
- 102000018832 Cytochromes Human genes 0.000 description 1
- 108010052832 Cytochromes Proteins 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 102000001554 Hemoglobins Human genes 0.000 description 1
- 108010054147 Hemoglobins Proteins 0.000 description 1
- 102000003992 Peroxidases Human genes 0.000 description 1
- DGEZNRSVGBDHLK-UHFFFAOYSA-N [1,10]phenanthroline Chemical compound C1=CN=C2C3=NC=CC=C3C=CC2=C1 DGEZNRSVGBDHLK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 108040007629 peroxidase activity proteins Proteins 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
Classifications
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- 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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
- G01N33/1813—Specific cations in water, e.g. heavy metals
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
本发明公开了一种现场快速检测分散饮用水中总铁含量的方法及装置，包括步骤1)、pH＝3‑6的乙酸‑乙酸钠缓冲溶液的制备；步骤2)、标准比色板的制备；步骤3)、最后对分散饮用水进行测试。本发明步骤简单，操作方便，适用于现场快速测定。
The invention discloses a method and a device for on-site rapid detection of total iron content in dispersed drinking water, comprising steps 1), preparation of acetic acid-sodium acetate buffer solution with pH=3-6; preparation; step 3), and finally test the dispersed drinking water. The method has simple steps and convenient operation, and is suitable for rapid on-site measurement.
Description
Technical field
The present invention relates to detection technique fields, and in particular to a kind of field quick detection dispersion total Iron in Drinking Water content
Method and device.
Background technique
Iron dust is hemoglobin, cytochromes enzyme, catalase in one of metallic element and human essential elements
With component part necessary to peroxidase.Meanwhile iron is also the detection project in standards for drinking water quality.National standard
Regulation iron content must be lower than 0.3mg/L in " standards for drinking water quality " (GB5749-2006).
Disperse drinking water and derive from water dispersion type, water dispersion type refers to that user directly fetches water from water source, without any
It handles or merely through simply dealt way of supplying water.Wherein, the water source of water dispersion type largely derives from the ground of relative clean
It is lauched.Currently, China still has most people to use dispersion drinking water.
It mainly include Phen spectrophotometry, original at present in measurement water there are many ways to iron content comparative maturity
Sub- absorptiometry, inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma emission spectrography
(ICP) etc..But analysis instrument needed for these methods is expensive, bulky, not readily portable and progress on-site test, and
And technical staff also needs relevant professional knowledge.
Summary of the invention
Problem to be solved by this invention is: providing a kind of method of field quick detection dispersion total Iron in Drinking Water content
And device, step is simple, and it is easy to operate, it is suitable for fast-field evaluation.
The present invention in order to solve the above problem provided by technical solution are as follows: it is total in a kind of field quick detection dispersion drinking water
The method of iron content, comprising the following steps:
Acetic acid-sodium acetate buffer solution preparation of step 1), pH=3-6: appropriate sodium acetate is taken, pure water is added to keep its molten
Solution, according to the reading of pH meter, the pH value for adjusting solution with glacial acetic acid is then transferred in volumetric flask to 3-6, adds water and be diluted to
Graduation mark；
The preparation of step 2), standard colorimetric plate:
A, it prepares developing solution: being in mass ratio 1:5:1000's with color developing agent phenanthrene alloxazine, reducing agent ascorbic acid and pure water
Ratio prepares developing solution；
B, prepared by ferrous ion standard reserving solution: precision weighs appropriate six ferrous sulfate hydrates ammonium, is dissolved in a small amount of pure water,
A small amount of concentrated hydrochloric acid is added, moves into brown volumetric flask after mixing evenly, and be settled to graduation mark with pure water, obtains Fe (II) standard
Stock solution；
C, the preparation of ferrous ion titer: the Fe as made from step b (II) standard inventory is pipetted using pipette
Liquid is diluted in volumetric flask with pure water to get ferrous ion standard solution；The ferrous ion of respective volume is pipetted using pipette
Standard solution in 5 colorimetric cylinders, prepare iron content be respectively 0.10mg/L, 0.30mg/L, 0.50mg/L, 0.80mg/L,
The ferrous ion titer of 1.00mg/L；
D, constant volume develops the color: pure water, developing solution, acetic acid-sodium acetate buffer solution are added in 5 colorimetric cylinders into step c,
3-10min is stood after shaking up, and observes color；
E, standard colorimetric plate determines: under white background, being taken caused by each colorimetric tube reaction as clapping immediately ahead of colorimetric cylinder
Color is printed on smooth surface photo paper after the software adjustment color of adjustment color to get standard colorimetric plate；
Dispersion drinking water in need of test is added to by being made in the step a in the step 2) by step 3)
Developing solution mixed solution in, shake up, the acetic acid-sodium acetate for adding the pH=3-6 as made from the step 1) is slow
Solution is rushed, is then shaken up, is compared after standing 5min with the standard colorimetric plate as made from the step 2), obtains iron in water sample
Concentration.
Preferably, the mass ratio of sodium acetate and pure water is 1:18 in the step 1).
Preferably, the concentrated hydrochloric acid in the step b in the step 2): six ferrous sulfate hydrate ammoniums: the mass ratio of pure water is
5.1:1:1424.3。
Preferably, the volume ratio of the step c ferrous ions standard reserving solution and pure water in the step 2) is 1:9.
Preferably, the pure water in the step d in the step 2), developing solution, the addition of acetic acid-sodium acetate buffer solution are suitable
Sequence is that pure water is first added, and adds developing solution, finally adds acetic acid-sodium acetate buffer solution.
Preferably, pure water, developing solution and the acetic acid-sodium acetate buffer solution being added in the step d in the step 2)
Volume ratio is about 2:1:2.
A kind of device of field quick detection dispersion total Iron in Drinking Water content, including device box, mini-funnels, filter paper,
For containing acetic acid-sodium acetate buffer solution centrifuge tube of the pH=3-6 as made from the step 1), passing through for containing
The digestion tube and the standard colorimetric plate as made from the step 2) of developing solution made from step a in the step 2), institute
It states and is equipped with the accommodation groove one for being used to place mini-funnels, the accommodation groove two for placing filter paper in container, be centrifuged for placing
The accommodation groove three of pipe and dismountable centrifugation is equipped with for placing the accommodation groove four of digestion tube, at the upper end opening of the centrifuge tube
Pipe lid is equipped with dismountable digestion tube lid at the digestion tube upper end opening.
Compared with prior art, the invention has the advantages that
(1) reagent used in color board manufacturing process is few, economical and practical；In process color, the colour stable of sample, just
In the acquisition of color；Made color board color-identifying degree is high, can accurately judge the total iron content in water sample.
(2) it is not necessarily to any costly and cumbersome instrument, operator is required low, step is simple, and it is easy to operate, use examination
Agent is few, uses manpower and material resources sparingly, price material benefit, easy to carry, is suitable for fast-field evaluation；Simultaneously, moreover it is possible to be selected for rural resident
It selects drinking water source and reference is provided.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes a part of the invention, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.
Fig. 1 is a kind of schematic diagram of the device of field quick detection dispersion total Iron in Drinking Water content of the invention；
Fig. 2 is a kind of signal of each component of the device of field quick detection dispersion total Iron in Drinking Water content of the invention
Figure；
Attached drawing mark: 1, device box, 2, short neck funnel 3, several 7cm filter paper, 4, tool lid centrifuge tube, 5, tool lid digestion tube,
6, color board, 7, centrifuge tube lid, 8, centrifuge tube 15mL reticule, 9, acetic acid-sodium acetate buffer solution, 10, digestion tube lid, 11,
Digestion tube 25mL reticule, 12, digestion tube 10mL reticule, 13, color developing agent and reducing agent.
Specific embodiment
Carry out the embodiment that the present invention will be described in detail below in conjunction with accompanying drawings and embodiments, how the present invention is applied whereby
Technological means solves technical problem and reaches the realization process of technical effect to fully understand and implement.
Embodiment 1
A kind of method of field quick detection dispersion total Iron in Drinking Water content, comprising the following steps:
Acetic acid-sodium acetate buffer solution preparation of step 1), pH=3-6: appropriate sodium acetate is taken, pure water is added to keep its molten
Solution, according to the reading of pH meter, the pH value for adjusting solution with glacial acetic acid is then transferred in volumetric flask to 3-6, adds water and be diluted to
Graduation mark；
The preparation of step 2), standard colorimetric plate:
A, it prepares developing solution: being in mass ratio 1:5:1000's with color developing agent phenanthrene alloxazine, reducing agent ascorbic acid and pure water
Ratio prepares developing solution；；
B, prepared by ferrous ion standard reserving solution: precision weighs appropriate six ferrous sulfate hydrates ammonium, is dissolved in a small amount of pure water,
A small amount of concentrated hydrochloric acid is added, moves into brown volumetric flask after mixing evenly, and be settled to graduation mark with pure water, obtains Fe (II) standard
Stock solution；
C, the preparation of ferrous ion titer: the Fe as made from step b (II) standard inventory is pipetted using pipette
Liquid is diluted in volumetric flask with pure water to get ferrous ion standard solution；The ferrous ion of respective volume is pipetted using pipette
Standard solution in 5 colorimetric cylinders, prepare iron content be respectively 0.10mg/L, 0.30mg/L, 0.50mg/L, 0.80mg/L,
The ferrous ion titer of 1.00mg/L；Wherein, the concentration of ferrous ion standard reserving solution can be by formula
It calculates, the concentration of ferrous ion titer can be by formula
It calculates；
D, constant volume develops the color: pure water, developing solution, acetic acid-sodium acetate buffer solution are added in 5 colorimetric cylinders into step c,
3-10min is stood after shaking up, and observes color；
E, standard colorimetric plate determines: under white background, being taken caused by each colorimetric tube reaction as clapping immediately ahead of colorimetric cylinder
Color is printed on smooth surface photo paper after the software adjustment color of adjustment color to get standard colorimetric plate；
Dispersion drinking water in need of test is added to by being made in the step a in the step 2) by step 3)
Developing solution mixed solution in, shake up, the acetic acid-sodium acetate for adding the pH=3-6 as made from the step 1) is slow
Solution is rushed, is then shaken up, is compared after standing 5min with the standard colorimetric plate as made from the step 2), obtains iron in water sample
Concentration.
Wherein, the mass ratio of sodium acetate and pure water is 1:18 in step 1).
Wherein, the concentrated hydrochloric acid in the step b in step 2): six ferrous sulfate hydrate ammoniums: the mass ratio of pure water is 5.1:1:
1424.3。
Wherein, the volume ratio of the step c ferrous ions standard reserving solution and pure water in step 2) is 1:9.
Wherein, the pure water in the step d in step 2), developing solution, acetic acid-sodium acetate buffer solution addition sequence are first
Pure water is added, adds developing solution, finally adds acetic acid-sodium acetate buffer solution.
Wherein, pure water, developing solution and the acetic acid-sodium acetate buffer solution volume ratio being added in the step d in step 2)
About 2:1:2.
Embodiment 2
A kind of method of field quick detection dispersion total Iron in Drinking Water content, comprising the following steps:
Acetic acid-sodium acetate buffer solution preparation of step 1), pH=3-6: appropriate sodium acetate is taken, pure water is added to keep its molten
Solution, according to the reading of pH meter, the pH value for adjusting solution with glacial acetic acid is then transferred in volumetric flask to 3-6, adds water and be diluted to
Graduation mark；
The preparation of step 2), standard colorimetric plate:
A, it prepares developing solution: preparing developing solution: luxuriant and rich with fragrance alloxazine 0.10g, ascorbic acid 0.50g being taken to add water to make it dissolve, then
It adds water and is diluted to 100mL.
B, prepared by ferrous ion standard reserving solution: six ferrous sulfate hydrate ammonium of 0.7g is accurately weighed, is dissolved in a small amount of pure water,
3mL concentrated hydrochloric acid is added, moves into brown volumetric flask after mixing evenly, and be settled to 1000mL with pure water, obtains Fe (II) standard
Stock solution；
C, the preparation of ferrous ion titer: 10mL the Fe as made from step b (II) standard is pipetted using pipette
Stock solution is diluted to graduation mark in 100mL volumetric flask, with pure water to get ferrous ion standard solution；It is pipetted using pipette
The ferrous ion standard solution of respective volume in 5 colorimetric cylinders, prepare iron content be respectively 0.10mg/L, 0.30mg/L,
The ferrous ion titer of 0.50mg/L, 0.80mg/L, 1.00mg/L；Wherein, the concentration of ferrous ion standard reserving solution can be with
By formulaIt calculates, the concentration of ferrous ion titer can be by formulaIt calculates；
D, constant volume develops the color: pure water dilution being added in 5 colorimetric cylinders into step c, 5mL developing solution is added, adds second
Acid-sodium acetate buffer solution shakes up after being settled to 25mL, and addition sequence is that pure water is first added, and adds developing solution, finally adds again
Enter acetic acid-sodium acetate buffer solution, 3-10min is stood after shaking up, observes color；
E, standard colorimetric plate determines: under white background, being taken caused by each colorimetric tube reaction as clapping immediately ahead of colorimetric cylinder
Color is printed on smooth surface photo paper after the software adjustment color of adjustment color to get standard colorimetric plate；
Dispersion drinking water in need of test is added to by being made in the step a in the step 2) by step 3)
Developing solution mixed solution in, shake up, the acetic acid-sodium acetate for adding the pH=3-6 as made from the step 1) is slow
Solution is rushed, is then shaken up, is compared after standing 5min with the standard colorimetric plate as made from the step 2), obtains iron in water sample
Concentration.
As depicted in figs. 1 and 2, a kind of device of field quick detection dispersion total Iron in Drinking Water content, including device box,
Mini-funnels, filter paper, acetic acid-sodium acetate buffer solution centrifugation for containing the pH=3-6 as made from the step 1)
Pipe, the digestion tube for containing the developing solution as made from the step a in the step 2) and obtained by the step 2)
Standard colorimetric plate, accommodation groove one, the accommodation groove for placing filter paper for being used to place mini-funnels are equipped in the container
Two, for placing the accommodation groove three of centrifuge tube and for placing the accommodation groove four of digestion tube, at the upper end opening of the centrifuge tube
Equipped with dismountable centrifuge tube lid, dismountable digestion tube lid is equipped at the digestion tube upper end opening.
Wherein, environment temperature has an impact the color developing agent in digestion tube in order to prevent, the color developing agent in digestion tube
Be also possible to solid drug, constituent phenanthrene alloxazine, reducing agent ascorbic acid mass ratio be 1:5, when in use, be added
Pure water makes it dissolve just at prepared developing solution is the same in step a in step 2, luxuriant and rich with fragrance alloxazine, reducing agent ascorbic acid and
The mass ratio of pure water is 1:5:1000.
Detection method: from device box 1, taking the digestion tube 5 of 25mL, utilizes 3 mistake of mini-funnels 2 and filter paper of the short neck of 4cm
10mL water sample is filtered in digestion tube 5, is shaken up after dissolving drug, all by acetic acid-sodium acetate buffer solution 9 in centrifuge tube 4
It is added in digestion tube 5, tightens bottle cap 10 and shake up, compared after 5min with standard colorimetric plate 6, obtain the concentration of iron in water sample.
The beneficial effects of the present invention are:
(1) reagent used in color board manufacturing process is few, economical and practical；In process color, the colour stable of sample, just
In the acquisition of color；Made color board color-identifying degree is high, can accurately judge the total iron content in water sample.
(2) it is not necessarily to any costly and cumbersome instrument, operator is required low, step is simple, and it is easy to operate, use examination
Agent is few, uses manpower and material resources sparingly, price material benefit, easy to carry, is suitable for fast-field evaluation；Simultaneously, moreover it is possible to be selected for rural resident
It selects drinking water source and reference is provided.
Only highly preferred embodiment of the present invention is described above, but is not to be construed as limiting the scope of the invention.This
Invention is not only limited to above embodiments, and specific structure is allowed to vary.All protection models in independent claims of the present invention
Interior made various change is enclosed to all fall in the scope of protection of the present invention.
Claims (7)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109655454A (en) * | 2019-01-28 | 2019-04-19 | 江苏澳华生物科技研究院有限公司 | A kind of method of different valence state iron ion content in measurement feed |
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