Semi-quantitative detection method of quaternary ammonium salt of water quality

Abstract

The invention discloses a semi-quantitative detection method of quaternary ammonium salt of water quality. The method comprises the following steps: sucking a water sample to be detected into a reaction tube, dripping a quaternary ammonium salt detection reagent into the reaction tube, uniformly shaking, then immediately carrying out color comparison between the color of the shaken solution and a testing standard color card, and determining the content of the quaternary ammonium salt by comparing the color of the shaken solution with the testing standard color card, wherein the quaternary ammonium salt detection reagent comprises titan yellow, ethylene diamine tetraacetic acid (EDTA), Thymol blue and sodium hydroxide, and is prepared by mixing the titan yellow, the EDTA, the Thymol blue and the sodium hydroxide according to the mass ratio of 100: (5-100): (20-200): (10-100). According to the method, the concentration of the quaternary ammonium salt in the water sample can be rapidly detected only by the quaternary ammonium salt detection reagent, the reaction tube and the testing standard color card; the method is simple to operate, can be operated in real time on site, and meets the demand of rapidly analyzing a great deal of samples.

Description

technical field [0001] The invention relates to the technical field of water and waste water detection, in particular to a semi-quantitative detection method for water quality quaternary ammonium salts. Background technique [0002] Cationic surfactants have a very wide range of uses, such as softeners and detergents in the textile industry, foaming agents, defoamers, thickeners, and fluorescent agents in the daily chemical industry, and as Disinfectants, emulsifiers, etc. With the widespread production and use of cationic surfactants, a large amount of wastewater containing surfactants is inevitably discharged into rivers, oceans and other natural water bodies. It not only directly endangers the aquatic environment, but also inhibits the degradation of other toxic substances, resulting in serious water pollution. Because cationic surfactants can produce strong toxicity to enzymes and coenzymes by interacting with biological cell membranes, and thus have an increasing impa...

AI Technical Summary

Problems solved by technology

[0006] All existing methods need to be carried out in a laboratory, and special instruments and technicians must be equipped to operate

At the same time, it takes a long time for sample pretreatment and analysis, and it is difficult to be used in occasions where real-time and rapid monitoring of samples collected on site is required.

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