Detection agents for detecting chlorine dioxide in water, preparation method of detection agents and detection method

A chlorine dioxide and water detection technology, which is applied in the field of chemical analysis, can solve problems such as failure and affect the accuracy of measurement, and achieve the effect of solving the problem of not being able to store for a long time.

Inactive Publication Date: 2019-03-01
SHANGHAI YIDIAN SCI INSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] According to the national standard GB / T5750.11-2006 "Drinking Water Quality Inspection Method Disinfectant Index", the chlorine dioxide test reagent needs to be prepared into a liquid with a certain concentration, and then tested, and the DPD chromogenic agent must be stored after being made into a liquid Put it in a brown bottle and keep it in the refrigerator, otherwise it will become invalid soon and affect the accuracy of the measurement

Method used

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Examples

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Embodiment Construction

[0028] The invention includes indicator, chlorine dioxide buffer solution.

[0029] The indicator also includes indicator solvent and indicator powder, which are dissolved and mixed before use, and stored in a brown bottle. The indicator solvent is about 1mol / L sulfuric acid solution; the indicator powder is anhydrous DPD sulfate and EDTA disodium, which is mixed with indicator solvent to contain 1.1g / L anhydrous DPD sulfate and 2g / L EDTA disodium liquid.

[0030] The chlorine dioxide buffer solution is a mixed solution containing 1mol / L sodium citrate, 1mol / L sodium hydroxide and 2% glycine, and the three are mixed before use.

[0031] When measuring, mix the water sample to be tested with the indicator and chlorine dioxide buffer solution at a ratio of 10:1:1, and measure with a spectrophotometer or colorimeter within 2 minutes.

[0032] The specific implementation manners of the present invention will be further described in detail below in conjunction with examples.

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Abstract

The invention provides detection agents for detecting the content of chlorine dioxide in water, a preparation method of the detection agents and a detection method. The detection agents for detectingthe content of the chlorine dioxide in the water are characterized in that the detection agents comprise the reagent A and the reagent B, the reagent A is an indicator, and the indicator is a mixed solution containing 1.1g / L anhydrous DPD sulfate and 2g / L EDTA-Na2; and the reagent B is a chlorine dioxide buffer solution, and the chlorine dioxide buffer solution is a mixed solution containing 1mol / L sodium citrate, 1 mol / L sodium hydroxide and 2% glycine.

Description

technical field [0001] The invention relates to a detection technology of chlorine dioxide content in water, which can be used for measuring the content of chlorine dioxide in water by colorimetry, and belongs to the technical field of chemical analysis. It specifically relates to a detection agent for detecting chlorine dioxide content in water, a preparation method and a detection method thereof. Background technique [0002] At present, the state requires that all centralized water supply and factory water should be disinfected, and the remaining amount of disinfectant in the factory water and the water at the end of the pipe network should meet the national standard GB5749-2006 "Drinking Water Hygienic Standard". There are many kinds of disinfectants for water disinfection. Traditional disinfectants include chlorine gas or liquid chlorine, while emerging ones include chlorine dioxide, ozone, ultraviolet rays, etc. Correspondingly, the content of residual chlorine, total...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/78
CPCG01N21/31G01N21/78
Inventor 马丽
Owner SHANGHAI YIDIAN SCI INSTR
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