CN106153498A - A kind of new method detecting solute concentration in solution and device thereof - Google Patents
A kind of new method detecting solute concentration in solution and device thereof Download PDFInfo
- Publication number
- CN106153498A CN106153498A CN201510191819.5A CN201510191819A CN106153498A CN 106153498 A CN106153498 A CN 106153498A CN 201510191819 A CN201510191819 A CN 201510191819A CN 106153498 A CN106153498 A CN 106153498A
- Authority
- CN
- China
- Prior art keywords
- solution
- density
- concentration
- solute
- measured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
The present invention relates to survey the new method of solute concentration in solution, described method includes: 1) utilizes the standard substance of solute to be configured to the solution containing described standard substance of at least two variable concentrations, measures the density of described solution respectively；2) according to concentration and the linear regression relation of its density recorded of described solution, obtaining the normal concentration of described solute and the equation of linear regression y=bx+a of density, wherein, y is the concentration of described solute, and x is the density of described solution；3) measure the density of solution to be measured, according to described equation of linear regression y=bx+a, try to achieve the concentration of described solution to be measured, and the solute of described solution to be measured is identical with described solute standard substance.Present invention also offers and a kind of measure the device of solute concentration in solution, described device includes high accuracy densimeter, and wherein, described high accuracy densimeter is for measuring the density of described solution.
Description
Technical field
The present invention relates to survey new method and the device thereof of solute concentration in solution.
Background technology
At present, the detection method of MDEA solution concentration is not yet formulated national standard by China, and conventional detection method has gas chromatogram
Method and acid base neutralization titration method.
Gas chromatography to the mensuration of amine it is generally required to through derivative, complex operation, time-consuming about 1 hour, and use
Carrier cost is high.
Neutralization titration complex operation, analysis time is long, needs about 1 hour, and owing to acid base titration selectivity is the highest, de-
Primary amine, secondary amine and other alkaline impurities serious interference in sulfur liquid, brings gross error to detection.
In sum, the detection method complex operation of the most conventional MDEA solution concentration, the longest, or carrier cost is high, or
There is gross error.For solving many defects that current methods exists, need badly invention a kind of simple, quick, use cost is low
MDEA solution concentration measurer and mensuration new method thereof.
Summary of the invention
It was discovered by researchers that in solution there is linear relationship, therefore, the present invention in the concentration of solute and its density within the specific limits
One of provide and a kind of measure the method for solute concentration in solution, described method includes: 1) utilize the standard substance of solute be configured to
The solution containing described standard substance of few two kinds of variable concentrations, measures the density of described solution respectively；
2) according to the concentration of described solution and the linear regression relation of its density that records, obtain the normal concentration of described solute and its
The equation of linear regression y=bx+a of density, wherein, y is the concentration of described solute, and x is the density of described solution；
3) measure the density of solution to be measured, according to described equation of linear regression y=bx+a, try to achieve the concentration of described solution to be measured,
And the solute of described solution to be measured is identical with described solute standard substance, wherein, the described degree of accuracy recorded is more than or equal to
0.0001g/cm3。
Research worker also finds, the density of a lot of solution is influenced by temperature, and when the temperature of solution changes, its density is also
Can occur to change accordingly, therefore, in order to obtain solution density value the most accurately, described method also includes: described measuring
During the density of standard substance and the density of solution to be measured, described solution is carried out thermostatic control.
In a specific embodiment, described solute is N methyldiethanol amine solution.
The two of the present invention provide and a kind of measure the device of solute concentration in solution, and described device includes high accuracy densimeter, wherein,
Described high accuracy densimeter is for measuring the density of described solution, and the densitometric degree of accuracy of described high accuracy is more than or equal to
0.0001g/cm3。
In a specific embodiment, described device also includes the temperature regulating device controlling described solution temperature, and measures described molten
The temperature measuring equipment of liquid temp.
In a specific embodiment, described solute is N methyldiethanol amine.
Beneficial effects of the present invention:
The present invention uses high accuracy densimeter that MDEA concentration of aqueous solution is carried out concentration mensuration, and this is that one is simple, quick, makes
With the MDEA solution concentration assay method of low cost, time-consumingly less than 10 minutes.Its ultimate principle is based on variable concentrations
The density of MDEA solution is different, draws standard MDEA CONCENTRATION DENSITY curve, by the accurate measuring samples of high accuracy Density Measuring Instrument
The density of solution, searches normal concentration density curve, it is possible to obtain the concentration value of sample.
Additionally, the densitometric degree of accuracy of high accuracy is 0.0001g/cm3(0.1kg/m3), then error in reading is 0.05kg/m3, meter
Calculating and show that the concentration error caused by densimeter is 0.19% < 1%, therefore, when concentration often improves 1%, the density of its correspondence improves
About 0.4kg/m3, thus meet the requirement of scene application.
Because the density of solution changes with concentration change, between density and concentration, there is certain corresponding relation.So,
The method, in addition to being used for measuring MDEA concentration, relates to binary solution concentration monitor and analysis in other laboratory or industrial process
Place, the concentration of the most all kinds of acid, alkali, saline solution or organic solution, this densimetry can be used to measure its concentration.
Accompanying drawing explanation
Fig. 1 is the MDEA normal concentration density curve calculated by method of least square, and equation of linear regression
Y=bx+a, wherein, y is the concentration of described solute, and x is the density of described solution.The densitometric degree of accuracy of high accuracy number is
0.0001g/cm3, it would be desirable to the sample of chemical examination carries out density measurement under identical temperature conditions, and the density value according to measuring is looked into dense
Degree density curve can be obtained by the MDEA solution concentration of sample, such as, in Fig. 1 shown in dotted line, it is also possible to according to line
Property regression equation tries to achieve MDEA solution concentration.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described below.
Embodiment
Comprise the concrete steps that:
1) under 20 DEG C of indoor temperatures, take 20mL pure MDEA solution and 80mL softens water, by two kinds of solution in beaker
It is made into the MDEA titer of 20% after mixing, takes 50mL and put into high accuracy number densimeter (precision reaches 0.0001g/cm3)
Measuring cup in measure the density of 20% concentration titer；
2) successively, the MDEA titer of the variable concentrations such as 30%, 40%, 50%, 60%, 70%, 80% is allotted respectively,
And by the density of high accuracy number densimeter measurement titer；
3) normal concentration density curve is drawn with the density value of MDEA titer under variable concentrations；
4) sample to needs chemical examination, and stand 30 minutes under the indoor temperature of 20 DEG C, use high accuracy number densimeter
The density of measuring samples, the MDEA solution concentration of available sample on normal concentration density curve.
Additionally, after MDEA solution uses a period of time, may be dissolved with other materials causing variable density in solution so that
The result generation deviation of densimetry, at this moment needs to use chromatograph of liquid that the sample obtained is carried out component demarcation, thus draws reality
MDEA solution concentration, application high accuracy number density measurement MDEA solution density and chromatography demarcate solution dense
Degree does intersection point on normal concentration densogram, makes the line parallel with normal concentration density curve with by this point
As the concentration and density curve revised, with this curve as new calibration line, eliminating system error.
The key equipment of the method is high accuracy Density Measuring Instrument, and the precision of Density Measuring Instrument determines the accuracy of analysis.From fig. 1, it can be seen that
When concentration often improves 1%, density improves about 0.4kg/m3.The most densitometric degree of accuracy is 0.0001g/cm3(0.1kg/m3), read
Number error is 0.05kg/m3, therefore, densimeter the concentration error caused is less than 0.19% < 1% (error that accuracy of instrument causes
δA=0.1/ √ 3, error in reading δB=0.1/2=0.05, total error δ=√ δ A2+δB2=0.076, concentration error=δ/0.4*1%=0.19%).
Claims (6)
1. measuring a method for solute concentration in solution, described method includes: 1) utilize the standard substance of solute to be configured at least
The solution containing described standard substance of two kinds of variable concentrations, measures the density of described solution respectively；
2) according to the concentration of described solution and the linear regression relation of its density that records, obtain the normal concentration of described solute and its
The equation of linear regression y=bx+a of density, wherein, y is the concentration of described solute, and x is the density of described solution；
3) measure the density of solution to be measured, according to described equation of linear regression y=bx+a, try to achieve the concentration of described solution to be measured,
And the solute of described solution to be measured is identical with described solute standard substance, wherein, the described degree of accuracy recorded is more than or equal to
0.0001g/cm3。
Method the most according to claim 1, it is characterised in that described method also includes: measuring the close of described standard substance
During the density of degree and solution to be measured, described solution is carried out thermostatic control.
Method the most according to claim 1 and 2, it is characterised in that described solute is N methyldiethanol amine solution.
4. measuring a device for solute concentration in solution, described device includes high accuracy densimeter, wherein, described high precision dense
Degree meter is for measuring the density of described solution, and the densitometric degree of accuracy of described high accuracy is more than or equal to 0.0001g/cm3。
Device the most according to claim 4, it is characterised in that described device also includes the temperature control controlling described solution temperature
Device, and measure the temperature measuring equipment of described solution temperature.
6. according to the device described in claim 4 or 5, it is characterised in that described solute is N methyldiethanol amine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191819.5A CN106153498A (en) | 2015-04-22 | 2015-04-22 | A kind of new method detecting solute concentration in solution and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510191819.5A CN106153498A (en) | 2015-04-22 | 2015-04-22 | A kind of new method detecting solute concentration in solution and device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106153498A true CN106153498A (en) | 2016-11-23 |
Family
ID=58059000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510191819.5A Pending CN106153498A (en) | 2015-04-22 | 2015-04-22 | A kind of new method detecting solute concentration in solution and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106153498A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346239A (en) * | 2019-07-10 | 2019-10-18 | 国家纳米科学中心 | A kind of detection method of nano material density |
| CN110441468A (en) * | 2019-05-31 | 2019-11-12 | 青岛海湾集团有限公司 | The measuring method of calcium chloride solution calcium content during a kind of ammonia-soda process calcium chloride |
| CN110823761A (en) * | 2018-08-13 | 2020-02-21 | 兰州蓝星纤维有限公司 | Method for measuring content of ethylene glycol in frozen water |
| CN111521509A (en) * | 2020-04-21 | 2020-08-11 | 紫锐集团有限公司 | Gas concentration measurement device in solution |
| CN112067499A (en) * | 2020-04-30 | 2020-12-11 | 浙江开化合成材料有限公司 | A kind of analysis method of phenyltributanone oximosilane content in mixed solution |
| CN112504916A (en) * | 2020-11-04 | 2021-03-16 | 浙江恒逸聚合物有限公司 | Physical test method for rapidly determining pentaerythritol content |
| CN113049443A (en) * | 2021-04-30 | 2021-06-29 | 蒋骏迪 | Method for measuring quantity and concentration of solution substance in chemical analysis |
| CN113504151A (en) * | 2021-06-10 | 2021-10-15 | 中国核电工程有限公司 | Device and method for measuring foam mixing ratio of foam fire-fighting system based on density method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87214417U (en) * | 1987-10-22 | 1988-04-06 | 江西铜业公司贵溪冶炼厂 | Density type liquid concentration gauge |
| CN102135486A (en) * | 2010-12-22 | 2011-07-27 | 中国科学院山西煤炭化学研究所 | Method for quickly detecting concentration of polyacrylonitrile-based free radical coagulation bath |
| CN102607994A (en) * | 2012-02-29 | 2012-07-25 | 上海交通大学 | Method for measuring concentration of halogenated salt hydrate slurry |
| CN102768263A (en) * | 2012-07-23 | 2012-11-07 | 江苏长乐纤维科技有限公司 | Method for measuring concentration of pentaerythritol solution in polyester production |
| CN103048220A (en) * | 2012-12-05 | 2013-04-17 | 清华大学 | Iodine hydroiodic acid container capable of displaying liquid concentration on line |
| CN103712937A (en) * | 2013-12-17 | 2014-04-09 | 南京信息工程大学 | A method for measuring the concentration of C60 stable dispersed aqueous solution |
-
2015
- 2015-04-22 CN CN201510191819.5A patent/CN106153498A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87214417U (en) * | 1987-10-22 | 1988-04-06 | 江西铜业公司贵溪冶炼厂 | Density type liquid concentration gauge |
| CN102135486A (en) * | 2010-12-22 | 2011-07-27 | 中国科学院山西煤炭化学研究所 | Method for quickly detecting concentration of polyacrylonitrile-based free radical coagulation bath |
| CN102607994A (en) * | 2012-02-29 | 2012-07-25 | 上海交通大学 | Method for measuring concentration of halogenated salt hydrate slurry |
| CN102768263A (en) * | 2012-07-23 | 2012-11-07 | 江苏长乐纤维科技有限公司 | Method for measuring concentration of pentaerythritol solution in polyester production |
| CN103048220A (en) * | 2012-12-05 | 2013-04-17 | 清华大学 | Iodine hydroiodic acid container capable of displaying liquid concentration on line |
| CN103712937A (en) * | 2013-12-17 | 2014-04-09 | 南京信息工程大学 | A method for measuring the concentration of C60 stable dispersed aqueous solution |
Non-Patent Citations (1)
| Title |
|---|
| 闫自华: "利用浓度和密度的关系快速检测浆状碳酸钙浓度", 《中华纸业》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823761A (en) * | 2018-08-13 | 2020-02-21 | 兰州蓝星纤维有限公司 | Method for measuring content of ethylene glycol in frozen water |
| CN110441468A (en) * | 2019-05-31 | 2019-11-12 | 青岛海湾集团有限公司 | The measuring method of calcium chloride solution calcium content during a kind of ammonia-soda process calcium chloride |
| CN110346239A (en) * | 2019-07-10 | 2019-10-18 | 国家纳米科学中心 | A kind of detection method of nano material density |
| CN110346239B (en) * | 2019-07-10 | 2022-02-11 | 国家纳米科学中心 | Method for detecting density of nano material |
| CN111521509A (en) * | 2020-04-21 | 2020-08-11 | 紫锐集团有限公司 | Gas concentration measurement device in solution |
| CN112067499A (en) * | 2020-04-30 | 2020-12-11 | 浙江开化合成材料有限公司 | A kind of analysis method of phenyltributanone oximosilane content in mixed solution |
| CN112504916A (en) * | 2020-11-04 | 2021-03-16 | 浙江恒逸聚合物有限公司 | Physical test method for rapidly determining pentaerythritol content |
| CN113049443A (en) * | 2021-04-30 | 2021-06-29 | 蒋骏迪 | Method for measuring quantity and concentration of solution substance in chemical analysis |
| CN113504151A (en) * | 2021-06-10 | 2021-10-15 | 中国核电工程有限公司 | Device and method for measuring foam mixing ratio of foam fire-fighting system based on density method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106153498A (en) | A kind of new method detecting solute concentration in solution and device thereof | |
| CN103018148B (en) | Method for measuring porosity of coal core | |
| CN103558335A (en) | Method for determining modified Karl Fischer water | |
| CN107271324A (en) | A kind of micro volatile liquid density measuring equipment and method | |
| CN104034891A (en) | Method and kit for quantitatively measuring beta-glucuronidase in multiple samples by enzyme-linked immunosorbent assay (ELIASA) instrument | |
| CN103293175A (en) | Method for measuring chemical components of liquid sodium silicate | |
| CN102252885B (en) | Preparation method of water content standard material | |
| CN105548115B (en) | The assay method of Mercury In Soil | |
| CN105319315A (en) | High performance liquid chromatography analysis method of 3-methylbenzoyl chloride | |
| CN106226383A (en) | A kind of method measuring nitrogen gas concn based on minimum gas pre-concentration device isotopic ratio GC-MS | |
| CN104849335A (en) | Method for detecting ionic calcium content of blood sample | |
| CN105319303A (en) | Determination method of content of fusel in ethylene carbonate | |
| CN107219531A (en) | A kind of pilot system for measurement sample mass and size during Frozen-thawed cycled | |
| CN110780002A (en) | High-efficiency low-cost detection method for quantifying essential oil components | |
| Ivashchenko et al. | Application of the sorption-frequency method in comparison with other methods for measurement of humidity nanoconcentrations in gases and liquids | |
| CN106124714B (en) | For the sulfur dioxide on-line monitoring method and device during wine production | |
| CN104280368A (en) | Method for efficiently and accurately detecting main content of industrial magnesium oxide | |
| CN106959318A (en) | A kind of method for determining full content of Sulphur in coal | |
| JP2006208125A (en) | Isotope ratio analysis method using plasma ion source mass spectroscope | |
| CN105675809A (en) | Analysis method of concentration of HI-I2-H2O ternary solution | |
| CN104833673A (en) | Content detection method of chemical intermediate N-methyl piperazine | |
| CN114460064B (en) | Rapid detection method for purity of potassium chloride for drilling fluid | |
| CN204359760U (en) | Gas chromatograph electronic closed loop formula gas flow automatic calibration control device | |
| CN109507339A (en) | Measuring method of the liquid chromatogram-high resolution mass spectrometry for crystal methamphetamine in human urine | |
| Ananthanarayanan et al. | High resolution conductometry for isotopic assay of deuterium in mixtures of heavy water and light water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161123 |
|
| RJ01 | Rejection of invention patent application after publication |