Reagent kit for detecting residual chlorine in water

A technology for detecting reagents and reagent packs, which is applied in the direction of material analysis by observing the impact on chemical indicators, and analysis by making materials undergo chemical reactions, which can solve the problems of inconvenient determination of residual chlorine, unstable shelf life of liquid reagents, etc.

Inactive Publication Date: 2011-07-20
杨海宁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the basis of the national standard and international standard residual chlorine detection and analysis method, the present invention mixes the liquid reagents used in the determination into a solid reagent package through calculation and proportion, and the residual chlorine value measured by the reagent package

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1. Preparation of solid buffer: Accurately weigh 24g of anhydrous disodium hydrogen phosphate and 46g of anhydrous potassium dihydrogen phosphate and mix evenly for use. After the buffer is dissolved in water, the pH value of the buffer solution is 6.5;

[0017] 2. Preparation of total chlorine developer: Accurately weigh 1.0g of DPD sulfate and 18g of potassium iodide and mix them evenly for later use;

[0018] 3. Production of the total chlorine reagent pack: Accurately weigh 16g of solid buffer, 19g of total chlorine developer and 1.0g of masking agent EDTA-2Na, mix them evenly and protect them from light immediately, seal and package them into small bags of 0.2g / bag , moisture-proof preservation.

Embodiment 2

[0020] 1. Preparation of solid buffer: Accurately weigh 24g of anhydrous disodium hydrogen phosphate and 46g of anhydrous potassium dihydrogen phosphate and mix evenly for use. After the buffer is dissolved in water, the pH value of the buffer solution is 6.5;

[0021] 2. Preparation of free chlorine reagent pack: Weigh 16g of solid buffer, 1.0g of free chlorine developer DPD hydrochloride and 1.0g of masking agent EDTA-2Na, mix them evenly and immediately avoid light, seal and package into 0.1g / Packed in sachets for moisture-proof storage.

Embodiment 3

[0023] 1. Preparation of solid buffer: Accurately weigh 24g of anhydrous disodium hydrogen phosphate and 46g of anhydrous potassium dihydrogen phosphate and mix evenly for use. After the buffer is dissolved in water, the pH value of the buffer solution is 6.5;

[0024] 2. Preparation of total chlorine developer: Accurately weigh 1.0g of DPD oxalate and 18g of potassium iodide and mix evenly for use;

[0025] 3. Production of the total chlorine reagent pack: Accurately weigh 16g of solid buffer, 19g of total chlorine developer and 1.0g of masking agent EDTA-2Na, mix them evenly and protect them from light immediately, seal and package them into small bags of 0.2g / bag , moisture-proof preservation.

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PUM

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Abstract

The invention relates to a reagent kit for detecting residual chlorine in water, which comprises a free-chlorine detecting reagent kit and a total-chlorine detecting reagent kit, wherein the reagent kit is prepared by mixing solid buffer, color-developing agent and masking agent in proportion; the free-chlorine detecting reagent kit is prepared by mixing the solid buffer, free-chlorine color-developing agent and masking agent in weight ratio of 16:1:1; and the total-chlorine detecting reagent kit is prepared by mixing the solid buffer, total-chlorine color-developing agent and masking agent in weight ratio of 16:19:1. The reagent kit provided by the invention is conveniently, quickly and accurately used. By the invention, the inconvenience and difficulties in the application of the original liquid reagent can be overcome and the quality guarantee period of the detecting reagent can be prolonged, and the reagent kit fully meets the requirement of residual chlorine detection in chlorination disinfection commonly used in various industries. Besides, the proportion of buffer is large in the reagent kit and the buffer can be used for buffering the pH values of various types of surface water and underground water, as well as industrial sewage and sanitary sewage, therefore the pH value of a detected water sample is not necessary to adjust when the reagent kit is used in the detection. The reagent kit is more convenient to use and has high popularization value and use value.

Description

technical field [0001] The invention relates to a chemical reagent used for water quality analysis and determination, in particular to a water quality residual chlorine detection reagent pack. Background technique [0002] According to the national requirements for drinking water quality and sanitation: 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 comply with the national GB5749-2006 "Drinking Water Sanitation Standard". There are many types of disinfectants for water disinfection, such as liquid chlorine, chlorine dioxide, ozone, ultraviolet light, etc. In terms of comprehensive indicators such as disinfection effect, disinfection cost, and the amount of disinfectant at the end of the pipe network, the domestic and foreign drinking water The most widely used disinfectant is chlorine disinfectant. For other water disinfection such as indu...

Claims

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Application Information

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IPC IPC(8): G01N21/78
Inventor 杨海宁白东江徐文甫
Owner 杨海宁
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