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Method for determining content of peracetic acid

A method of determination, the technology of peracetic acid, applied in the field of analysis and measurement, can solve the problems of difficult storage of detection reagents, complex operation of detecting peracetic acid, high cost, etc., and achieve the effect of being suitable for long-term measurement, stable measurement reagents and reliable results

Inactive Publication Date: 2020-08-07
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] For the above defects or improvement needs of the prior art, the invention provides a kind of assay method of peracetic acid content, it is by adding divalent cobalt ion and azo dye in the water sample containing peracetic acid, peracetic acid Under the catalysis of divalent cobalt ions, carbon-centered free radicals will be generated, and the generated carbon-centered free radicals can quickly oxidize azo dyes, and the concentration of peracetic acid can be determined by measuring the change in the absorbance of azo dyes by photometry, thus Solve the technical problems of detecting peracetic acid in the prior art or the operation is complicated, or the cost is high, or the detection reagent is not easy to store

Method used

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  • Method for determining content of peracetic acid
  • Method for determining content of peracetic acid
  • Method for determining content of peracetic acid

Examples

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Effect test

Embodiment 1

[0042] The assay method of peracetic acid content in a kind of water of the present embodiment is measured according to the following steps:

[0043] Step 1: Fully mix cobalt acetate solution, sodium acetate solution, reactive brilliant red dye X3-B and peracetic acid standard solutions of different concentrations, so that the final concentration of cobalt acetate solution is 0.02mM, and the final concentration of sodium acetate solution is 20mM. The final concentration of brilliant red dye X3-B is 0.1mM, and the final concentration of peracetic acid reaches 0, 25, 50, 75, 100 μM respectively; after reacting for 10 minutes, measure the reactive brilliant red dye X3-B at different concentrations of peracetic acid in The absorbance value at 484nm; record the absorbance value of reactive brilliant red dye X3-B at 484nm under peracetic acid concentration 0μM is A, the absorbance value of reactive brilliant red dye X3-B at 484nm after peracetic acid oxidation is B, with A The diffe...

Embodiment 2

[0051] The assay method of peracetic acid content in a kind of water of the present embodiment is measured according to the following steps:

[0052] Step 1: Fully mix cobalt acetate solution, sodium acetate solution, azo dye orange II and peracetic acid standard solutions of different concentrations, so that the final concentration of cobalt acetate solution is 0.02mM, the final concentration of sodium acetate solution is 20mM, and the final concentration of orange II The concentration is 0.1mM, and the final concentration of peracetic acid reaches 0, 25, 50, 75, 100 μM respectively; after reacting for 10 minutes, measure the absorbance value of orange II at 538nm under different peracetic acid concentrations; The absorbance value at 538nm is A, and the absorbance value of Orange II at 538nm after peracetic acid oxidation is B, and the difference between A and B is the abscissa, and the final concentration of peracetic acid is the ordinate to establish a standard curve;

[00...

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Abstract

The invention belongs to the technical field of peracetic acid content determination, and particularly relates to a peracetic acid content determination method. The method comprises the following steps: mixing a water sample containing peracetic acid with a salt solution containing divalent cobalt ions and azo dye to obtain a mixed solution, wherein the peracetic acid in the mixed solution can generate carbon center free radicals under the catalytic action of divalent cobalt ions, the generated carbon center free radicals can quickly generate decoloration reaction with azo dyes, and the concentration of the peracetic acid is reflected by measuring the change of absorbance before and after the azo dye decoloration reaction through a photometric method. Therefore, the technical problems thatin the prior art, peracetic acid detection is complex in operation or high in cost, or a detection reagent is not easy to store are solved.

Description

technical field [0001] The invention belongs to the technical field of analysis and measurement, and more specifically relates to a method for determining the content of peracetic acid. Background technique [0002] Peracetic acid is a green oxidizing agent, which is widely used in the paper industry, food industry, drinking water and sewage treatment, ship ballast water treatment, hospital disinfection and sterilization, etc. When peracetic acid is in use, it is often necessary to measure the concentration of peracetic acid to examine its utilization efficiency. At present, the measurement methods of peracetic acid mainly include titration, chromatography, and spectrophotometry. The titration method first needs to remove hydrogen peroxide in water, and then titrates peracetic acid by iodometric method. The reaction needs to be carried out under strong acidic conditions, and the measurement is relatively complicated and cumbersome, with the disadvantage of large error; alth...

Claims

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Application Information

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IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 谢鹏超王晶文王宗平王松林岳思阳万颖丁家琪
Owner HUAZHONG UNIV OF SCI & TECH
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