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Rapid determination tablet for free chlorine residuals for water quality on the spot and preparation method thereof

A technology for rapid determination and residual chlorine, which is applied in color/spectral characteristic measurement, material analysis by observing the influence on chemical indicators, and analysis by making materials undergo chemical reactions. It can solve the problem of high and low concentrations of ozone, dissolved Slow speed and low temperature detection, easy oxidation and deterioration of tablets, etc., to achieve the effects of good formability, oxidation inhibition, and large buffer capacity

Active Publication Date: 2014-08-27
GUANGDONG HUANKAI MICROBIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the existing tablets are easy to oxidize and deteriorate, some dissolve too slowly (not suitable for low-temperature detection), and some reagent blanks are too high (not suitable for low-concentration ozone detection), so it is necessary to develop a reagent with good stability and Reagent for determining free residual chlorine in water with low blank value and fast disintegration speed

Method used

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  • Rapid determination tablet for free chlorine residuals for water quality on the spot and preparation method thereof
  • Rapid determination tablet for free chlorine residuals for water quality on the spot and preparation method thereof
  • Rapid determination tablet for free chlorine residuals for water quality on the spot and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A tablet for quick determination of free residual chlorine in water, its raw materials are composed of the following components in mass percentage: N, N-diethyl-p-phenylenediamine sulfate 2%, EDTA-2Na 2%, sodium bicarbonate 18%, Boric acid 46%, potassium dihydrogen phosphate 32%.

[0025] The preparation method comprises the following steps: drying the raw materials to constant weight, pulverizing them to 40-100 meshes, and mixing uniformly to obtain a mixed powder, which is compressed into tablets on a tablet machine, each tablet is 0.1g, and the tablet is double- Foil wrapped.

Embodiment 2

[0027] A tablet for rapid determination of free residual chlorine in water, its raw materials are composed of the following components in mass percentage: N, N-diethyl-p-phenylenediamine sulfate 1%, EDTA-2Na 1%, sodium bicarbonate 20%, Boric acid 43%, potassium dihydrogen phosphate 35%. Its preparation method is with embodiment 1.

Embodiment 3

[0029] A tablet for quick determination of free residual chlorine in water, its raw materials are composed of the following components in mass percentage: N, N-diethyl-p-phenylenediamine sulfate 3%, EDTA-2Na 2%, sodium bicarbonate 17%, Boric acid 48%, potassium dihydrogen phosphate 30%. Its preparation method is with embodiment 1.

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Abstract

The present invention disclosed a kind of water quality free residual chlorine to quickly measure tablets and their preparation methods.20%, 40-55%lubricant, and 25-35%of the pH regulator.The invention of the invention is smaller than the surface area, smooth and smooth surface, and beautiful appearance and luster.The invention of the present invention uses boric acid as a lubricant. It has good moldability, without fragmented powder and fragments, which can inhibit the oxidation of DPD. The invention tablets are disintegrated within 1 minute in the water.In the formula formula of the invention, sodium bicarbonate, boric acid, and potassium dihydrogen phosphate formula consisting of more than 88%of the formula formula of tablets has a large buffer capacity.PH of water, domestic sewage, and most industrial wastewater.

Description

technical field [0001] The invention relates to an on-site rapid determination tablet for free residual chlorine in water quality and a preparation method thereof. Background technique [0002] Free residual chlorine refers to the residual Cl in the water after the water quality has been disinfected by a chlorine-containing disinfectant. 2 , ClO - , the general term for HClO, is the most common test index in the determination of water quality disinfectant residues. Chlorine-containing disinfectants such as liquid chlorine and sodium hypochlorite are still the most widely used disinfectants in China because of their low cost and long-lasting bactericidal effect. They are widely used in the disinfection of drinking water, industrial wastewater, domestic sewage, swimming pool water and other water quality. It is very necessary to monitor the residual concentration of free residual chlorine in the disinfection process and water after disinfection. [0003] The standard test m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31G01N21/78
Inventor 邓金花吴清平秦惠陈志勇
Owner GUANGDONG HUANKAI MICROBIAL SCI & TECH
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