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A kind of content determination method of chloroacetic acid or chloroacetic acid salt in daily chemical product

A method of determination, the technology of chloroacetate, applied in the field of chemical detection, can solve the problems of low sensitivity, strong specialization, high detection limit, etc., and achieve good stability and reproducibility, strong anti-interference, and detection limit low effect

Active Publication Date: 2019-10-18
INFINITUS (CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although its sensitivity, recovery rate, and precision are high, it is difficult to achieve on-site rapid detection because of its strong professionalism, high cost, and the need to use large-scale gas chromatography instruments
Although the electrochemical detection method is fast and low-cost, the use of ordinary electrodes for electrochemical detection has shortcomings such as high detection limit, low sensitivity, and poor anti-interference, which limits its application in the detection of chloroacetic acid. The main reasons for not using electrochemical detection methods to detect chloroacetic acid

Method used

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  • A kind of content determination method of chloroacetic acid or chloroacetic acid salt in daily chemical product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of Example 1 Chloroacetic Acid Chemically Modified Electrode

[0029] (1) Take 10 mg of carbon nanotubes, add 20 mL of water, and sonicate for 20 minutes to obtain a carbon nanotube dispersion; take 3 mg of chloroauric acid and 1 mg of cobalt chloride hexahydrate and mix them with 5 mL of water to form a solution A; take 30 mg of sodium borohydride Add 18mL of water to form solution B;

[0030] (2) first add solution A dropwise to the carbon nanotube dispersion, then add solution B dropwise to the carbon nanotube dispersion; then let stand for 5 hours; then separate and wash to obtain a solid;

[0031] (3) 10 mg of the solid prepared in step (2) was dissolved in 10 mL of organic solvent, coated and fixed on a pretreated glassy carbon electrode with a diameter of 3 mm to obtain the chloroacetic acid chemically modified electrode;

[0032] The fixation described in the step (3) is fixed on the glassy carbon electrode after drying under the irradiation of an i...

Embodiment 2

[0044] The determination of the content of chloroacetic acid in certain brand shampoo in embodiment 2

[0045] (1) Prepare the sample solution to be tested: Precisely weigh 1 g of a certain brand of shampoo, dissolve and filter it with 100 mL of phosphate buffer with a pH of 7.0, take 2 mL of the filtrate and dilute to 250 mL with a phosphate buffer with a pH of 7.0;

[0046] (2) Use the chloroacetic acid chemically modified electrode prepared in Example 1 as the working electrode, the platinum electrode as the counter electrode, and the Ag-AgCl electrode as the reference electrode to form a three-electrode system, and use differential pulse voltammetry to measure the concentration in the sample solution to be tested. The oxidation peak current value of chloroacetic acid or chloroacetic acid salt, the concentration of chloroacetic acid or chloroacetic acid salt is converted according to the linear equation, and then the content of chloroacetic acid or chloroacetic acid salt in ...

Embodiment 3

[0050] The determination of the content of chloroacetic acid in a certain brand shower gel of embodiment 3

[0051] (1) Prepare the sample solution to be tested: Precisely weigh 1g of a certain brand of shower gel, dissolve and filter it with 100mL of phosphate buffer with a pH of 7.0, take 2mL of the filtrate and dilute to 250mL with a phosphate buffer with a pH of 7.0;

[0052] (2) Use the chloroacetic acid chemically modified electrode prepared in Example 1 as the working electrode, the platinum electrode as the counter electrode, and the Ag-AgCl electrode as the reference electrode to form a three-electrode system, and use differential pulse voltammetry to measure the concentration in the sample solution to be tested. The oxidation peak current value of chloroacetic acid or chloroacetic acid salt, the concentration of chloroacetic acid or chloroacetic acid salt is converted according to the linear equation, and then the content of chloroacetic acid or chloroacetic acid salt...

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Abstract

The invention relates to the technical field of chemical detection, and particularly discloses a method for measuring the content of chloroacetic acid or chloroacetate in a daily chemical product. An electrode chemically modified with chloroacetic acid is adopted in the method, and differential pulse voltammetry is adopted by the method for measurement. The method includes specific steps of (1) preparing a solution of a sample to be measured, and (2) forming a three-electrode system by adopting the electrode chemically modified with chloroacetic acid as a working electrode, adopting a platinum electrode as a counter electrode and adopting a Ag-AgCl electrode as a reference electrode, measuring the oxidization peak current value of the chloroacetic acid or chloroacetate in the solution of the sample to be measured through differential pulse voltammetry, and converting the current value into the concentration of the chloroacetic acid or chloroacetate according to a linear equation, thus obtaining the content of the chloroacetic acid or chloroacetate in the sample. The method is a novel method for measuring the content of the chloroacetic acid or chloroacetate in the daily chemical product, can achieve rapid detection of the chloroacetic acid or chloroacetate in the daily chemical product, and is simple to operate and low in cost.

Description

technical field [0001] The invention relates to the technical field of chemical detection, in particular to a method for determining the content of chloroacetic acid or chloroacetic acid salt in daily chemical products. Background technique [0002] Chloroacetic acid, also known as monochloroacetic acid, is a highly toxic compound. Chloroacetic acid solution or dust directly contacts the skin to cause redness, swelling, and water sores, accompanied by severe pain. Hyperkeratosis occurs after the blisters are absorbed, and they are cured after several peelings. Chloroacetic acid is widely used in the preparation of pesticides and organic synthesis intermediates, in addition, it is also an intermediate of dyes, medicines, pesticides, synthetic resins and other organic synthesis materials. [0003] Daily chemicals refer to technological chemicals used in people's daily life, including shampoo, shower gel, cosmetics, washing powder, etc. Chloroacetic acid is also a common raw ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/48
Inventor 陆智李延川李亚杰吴美欣王超杨琼利
Owner INFINITUS (CHINA) CO LTD