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Method for determining epoxy chloropropane in water

A technology for the determination of epichlorohydrin and its method, which is applied in the field of chemical analysis, can solve the problems of cumbersome operation and poor reproducibility, and achieve the effects of high sensitivity, high extraction efficiency and good work requirements

Active Publication Date: 2013-03-27
CHANGZHOU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

ECH may enter the water body through wastewater discharge or flocculants containing epichlorohydrin or pipes covered with epoxy resin. The current water quality standard (GB / T 5750.8) uses sodium chloride as the salting-out agent, and the gas phase of the packed column Chromatography, chromatographic peak height comparison method for quantitative detection, cumbersome operation, poor reproducibility

Method used

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  • Method for determining epoxy chloropropane in water

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Effect test

example 1

[0029] Determination of Epichlorohydrin Content in Epoxy Resin Plant Wastewater

[0030] Water samples were collected in 1000 mL brown reagent bottles at the outlet of an epoxy resin factory workshop, and three samples were collected in parallel. Take 100mL water sample and place it in a 250mL separatory funnel, adjust the pH value to 6.0-7.0, add 5g of magnesium chloride and shake to dissolve. Add 5.00mL of dichloromethane and shake for 10min, let stand to separate and collect the lower layer of dichloromethane solution; then continue to add 3.00mL of dichloromethane to the separated waste water, shake for 10min, let stand to separate and combine Collect the dichloromethane solution in the lower layer: continue to add 2.00mL of dichloromethane to the separated wastewater, shake for 10 minutes, let stand to separate layers, combine and collect the dichloromethane solution in the lower layer, shake well, and wait for capillary chromatography analysis.

[0031] (1) Test instrum...

example 2

[0051] Determination of Epichlorohydrin Content in Epoxy Diluent Workshop Wastewater of Chemical Plant

[0052] Collect water samples in 1000 mL brown reagent bottles at the drain, and collect 3 samples in parallel. Take 100mL water sample and place it in a 250mL separatory funnel, adjust the pH value to 6.0-7.0, add 5g of magnesium chloride and shake to dissolve. Add 5.00mL of dichloromethane and shake for 10min, let stand to separate and collect the lower layer of dichloromethane solution; then continue to add 3.00mL of dichloromethane to the separated waste water, shake for 10min, let stand to separate and combine Collect the dichloromethane solution in the lower layer: continue to add 2.00mL of dichloromethane to the separated wastewater, shake for 10 minutes, let stand to separate layers, combine and collect the dichloromethane solution in the lower layer, shake well, and wait for capillary chromatography analysis.

[0053] (1) Test instrument: Zhejiang Wenling Fuli Anal...

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Abstract

The invention relates to a method for determining epoxy chloropropane in water, and belongs to the technical field of chemical analysis. A salting-out and liquid-liquid extraction method is adopted to pretreat a water sample, magnesium chloride is taken as a salting-out agent, dichloromethane is taken as an extraction agent to extract epoxy chloropropane in water, and a capillary gas chromatography and an external standard curve method are adopted to quantitatively analyze. The method has high extraction efficiency, is simple, quick and accurate, has high sensitivity and good reproducibility and can satisfy the requirements on environment monitoring and water quality analyzing work.

Description

technical field [0001] The invention relates to a method for determining epichlorohydrin in water, belonging to the technical field of chemical analysis. Background technique [0002] Epichlorohydrin (ECH) is an organic epoxy compound with strong toxicity and a carcinogen. It is insoluble in water and miscible with most polar organic solvents. It has active chemical properties and is an important Organic chemical raw materials and fine chemical products, mainly used in the manufacture of glycerin and epoxy resin. ECH may enter the water body through wastewater discharge or flocculants containing epichlorohydrin or pipes covered with epoxy resin. The current water quality standard (GB / T 5750.8) uses sodium chloride as the salting-out agent, and the gas phase of the packed column Chromatography, chromatographic peak height comparison method for quantitative detection, cumbersome operation, poor reproducibility. This technology uses magnesium chloride as the salting-out agent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06
Inventor 郭登峰赵会晶
Owner CHANGZHOU UNIV
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