High-stability residual chlorine detection reagent, reagent kit and use method thereof

Abstract

The invention relates to the technical field of water quality detection, and discloses a high-stability residual chlorine detection reagent, a reagent kit and a use method thereof. The mass percentagesum of sodium citrate, potassium sodium tartrate, ethylenediaminetetraacetic acid or disodium salt in the residual chlorine detection reagent is greater than or equal to 20%, the mass percentage of N, N-diethyl p-phenylenediamine or salt is greater than or equal to 0. 5% and the mass percentage of potassium dihydrogen phosphate is greater than or equal to 50%. The composite film of the compositefilm packaging bag of the residual chlorine detection reagent is composed of a polytetrafluoroethylene film layer, a deoxidizer coating layer, a molecular sieve desiccant coating layer, an aluminum foil layer and a surface treatment layer which are arranged in turn from inside to outside. The absorbance value is automatically read by the colorimetric detector at intervals of 3-5s. Compared with the existing residual chlorine detection reagents, the stability of the detection process is high and the requirement for pH of the water body to be measured is broadened to 4-7. Meanwhile, the retention time of the residual chlorine detection kit is long, and the sensitivity of the detection kit combined with the colorimetric detector with interval readings can be increased by more than 10 times incomparison with the national standard method.

Description

technical field [0001] The invention relates to the technical field of water quality detection, in particular to a highly stable residual chlorine detection reagent, a kit and a use method. Background technique [0002] Residual chlorine refers to the chlorine remaining in water after the water has been in contact with chlorine-based disinfectants for a certain period of time. There are three forms: total residual chlorine, free residual chlorine and combined residual chlorine. Residual chlorine can ensure continuous sterilization and prevent water from being re-polluted. However, if the amount of residual chlorine exceeds the standard, it may aggravate the odor produced by phenols and other organic substances in the water, and may also generate carcinogenic organic chlorine compounds such as chloroform. Therefore, it is extremely important to measure the residual chlorine content and existing state in water to do a good job in drinking water disinfection and ensure water sa...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem of poor detection stability of existing residual chlorine detection reagents, this application provides a highly stable residual chlorine detection reagent, which can maintain stability within 5 to 15 minutes during detection, and at the same time requires a wider range of pH, improving universality of detection

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