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

A semi-quantitative detection, quaternary ammonium salt technology, applied in the measurement of color/spectral properties, analysis by chemical reaction of materials, and material analysis by observing the impact on chemical indicators, etc., can solve the problem of long processing and analysis time. , It is difficult to use real-time rapid monitoring and other problems to achieve the effect of simple operation

Active Publication Date: 2014-12-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) The components of the quaternary ammonium salt detection reagent: Dadan yellow: EDTA: thymol blue: sodium hydroxide are mixed according to the mass ratio of 100:5:20:100.

[0026] (2) The test standard color cards are purchased from Shenzhen Qiantongcai Trading Co., Ltd., the models are (CU color card series): PANTONE553C, PANTONE556C, PANTONE715C, PANTONE1575C, PANTONE7619C. These 5 models respectively represent color blocks with absorption wavelengths of 400nm, 415nm, 440nm, 480nm, and 500nm, and represent the concentration of quaternary ammonium salt: 0-150-300-400-600mg / L.

[0027] (3) During detection, draw 4 ml of the liquid to be tested into the reaction tube, add 3-5 drops of the quaternary ammonium salt detection reagent, and immediately determine the concentration of the quaternary ammonium salt by colorimetry after mixing.

[0028] After mixing, compare it with the standard color card immediately. If the color is consistent with PANTONE553C color, the con...

Embodiment 2

[0034](1) Each component of the quaternary ammonium salt detection reagent was mixed according to the ratio of 100:50:100:10 of Dadan yellow: EDTA: thymol blue: sodium hydroxide.

[0035] (2) The test standard color cards are purchased from Shenzhen Qiantongcai Trading Co., Ltd., the models are (CU color card series): PANTONE553C, PANTONE555C, PANTONE559C, PANTONE7555C, PANTONE1595C, PANTONE7626C. These 6 models are composed of color blocks representing absorption wavelengths of 400nm, 410nm, 425nm, 450nm, 490nm, and 500nm, respectively, representing the concentration of quaternary ammonium salts: 0-100-200-250-500-1000mg / L.

[0036] (3) During detection, draw 3 ml of the liquid to be tested into the reaction tube, add 3-5 drops of the quaternary ammonium salt detection reagent, and immediately determine the concentration of the quaternary ammonium salt by colorimetry after mixing.

[0037] After mixing, compare it with the standard color card immediately. If the color is cons...

Embodiment 3

[0043] (1) The components of the quaternary ammonium salt detection reagent were mixed together in a ratio of 100:100:200:60, including Dadanhuang: EDTA: Thymol Blue: Sodium Hydroxide.

[0044] (2) The testing standard color cards are purchased from Shenzhen Qiantongcai Trading Co., Ltd., the models are (CU color card series): PANTONE553C, PANTONE559C, PANTONE715C, PANTONE1575C, PANTONE1595C. These 5 models respectively represent color blocks with absorption wavelengths of 400nm, 420nm, 440nm, 480nm, and 500nm, and represent the concentration of quaternary ammonium salts: 0-200-300-400-500mg / L.

[0045] (3) During detection, draw 5 ml of the liquid to be tested into the reaction tube, add 3-5 drops of the quaternary ammonium salt detection reagent, and immediately determine the concentration of the quaternary ammonium salt by colorimetry after mixing.

[0046] After mixing, compare it with the standard color card immediately. If the color is consistent with PANTONE553C color, ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/31
Inventor 吴丹刘东红叶兴乾陈健初胡亚芹陈士国丁甜
Owner ZHEJIANG UNIV
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