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Method for rapidly detecting trace amount of halogenated biphenyl in water

A water body and biphenyl technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of low halogenated biphenyl content, personal injury of operators, cumbersome operation, etc., and achieve high-efficiency adsorption, speed-up detection process, and large-scale application potential effect

Active Publication Date: 2018-12-07
安徽省佳逸环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the content of halogenated biphenyls in water is very low, it is necessary to enrich the halogenated biphenyls in water samples for detection. At present, the enrichment of water samples generally adopts liquid-liquid extraction, solid phase extraction (SPE) Phase microextraction, these traditional extraction methods, such as Soxhlet extraction, ultrasonic oscillation extraction, air blowing capture, continuous liquid-liquid extraction and separatory funnel liquid-liquid extraction, although detection The yield rate is high, but the operation is often cumbersome and requires a large amount of organic solvents, which is easy to cause environmental pollution and personal injury to the operator

Method used

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  • Method for rapidly detecting trace amount of halogenated biphenyl in water
  • Method for rapidly detecting trace amount of halogenated biphenyl in water
  • Method for rapidly detecting trace amount of halogenated biphenyl in water

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Water sample to be tested:

[0025] Add polychlorinated biphenyls to 10ml of deionized water to make the concentration of 1ng / L, 10ng / L, 100ng / L, 1μg / L, and 10μg / L in the water respectively to obtain standard water samples to be tested; randomly collected 10ml of surface water instantaneous water sample. The water sample is stored in a brown glass bottle and placed in an environment of -4℃. The water sample is suction filtered before use, and passed through a 0.45μm pore water filter membrane, plus 10ng / L and 100ng / L, get a random water sample to be tested.

[0026] Detection process:

[0027] A method for rapid detection of trace halogenated biphenyls in water bodies includes the following steps:

[0028] S1. Dissolve polystyrene-N-vinylpyrrolidone copolymer in dichloromethane, add acetic acid sulfonic anhydride after heating to 65°C, the weight ratio of polystyrene-N-vinylpyrrolidone copolymer to acetic acid sulfonic anhydride is 1:1.5, heat preservation reaction for 2h, a...

Embodiment 2

[0036] Water sample to be tested:

[0037] Add polychlorinated biphenyls to 10ml of deionized water to make the concentration of 1ng / L, 10ng / L, 100ng / L, 1μg / L, and 10μg / L in the water respectively to obtain standard water samples to be tested; randomly collected 10ml of surface water instantaneous water sample. The water sample is stored in a brown glass bottle and placed in a 0℃ environment. The water sample is filtered before use and passed through an aqueous membrane with a pore size of 0.45μm, plus 10ng / L and 100ng / L. , Get a random water sample to be tested.

[0038] Detection process:

[0039] A method for rapid detection of trace halogenated biphenyls in water bodies includes the following steps:

[0040] S1. Dissolve polystyrene-N-vinylpyrrolidone copolymer in dichloromethane, add acetic acid sulfonic anhydride after heating to 75°C, the weight ratio of polystyrene-N-vinylpyrrolidone copolymer to acetic acid sulfonic anhydride is 1:0.5, heat preservation reaction for 4h, add...

Embodiment 3

[0047] Water sample to be tested:

[0048] Add polybrominated biphenyls to 10ml of deionized water to make the concentrations of 1ng / L, 10ng / L, 100ng / L, 1μg / L, and 10μg / L in the water to obtain standard water samples to be tested; randomly collect surface water instants Water sample 10ml, the water sample is stored in a brown glass bottle, and placed in the environment of -4℃, the water sample is suction filtered before use, through the 0.45μm pore water filter membrane, plus 10ng / L and 100ng / L, get Random water samples to be tested.

[0049] Detection process:

[0050] A method for rapid detection of trace halogenated biphenyls in water bodies includes the following steps:

[0051] S1. Dissolve polystyrene-N-vinylpyrrolidone copolymer in dichloromethane, add acetic acid sulfonic anhydride after heating to 70°C, the weight ratio of polystyrene-N-vinylpyrrolidone copolymer to acetic acid sulfonic anhydride is 1:1, heat preservation reaction for 3h, add boiling water to precipitate, f...

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Abstract

The invention discloses a method for rapidly detecting a trace amount of halogenated biphenyl in water, and the method is as follows: dissolving a sulfonated polystyrene-N-vinylpyrrolidone copolymer in N-N-dimethylformamide and adding Fe3O4 powder for ultrasonic vibration to obtain a magnetic composite adsorbent; dispersing the magnetic composite adsorbent in a water body to be tested, magnetically attracting and concentrating the magnetic composite adsorbent dispersed in the water body to be tested onto the inner side wall surface of a container adjacent to a permanent magnet by use of the permanent magnet, discarding supernatant, ultrasonically eluting the magnetic composite adsorbent with an organic solvent, drying the magnetic composite adsorbent by blowing the magnetic composite adsorbent with nitrogen, and redissolving the magnetic composite adsorbent to obtain a test sample; and detecting the test sample by GC-MS. The method can effectively enrich the halogenated biphenyl in thewater body by using the magnetic composite adsorbent, and the adsorbent enriched with the trace amount of halogenated biphenyl can be quickly separated from the water body, and by combination with the GC-MS technology, rapid detection of the trace amount of halogenated biphenyls in the water body can be realized.

Description

Technical field [0001] The invention relates to the technical field of water body detection, in particular to a method for rapidly detecting trace halogenated biphenyls in water bodies. Background technique [0002] Due to its stable chemical properties and slow degradation in the environment, halogenated biphenyls can remain in the environment for a long time and are one of the most important persistent organic pollutants in the world. Take PCBs, for example. my country listed PCBs on the "Blacklist of Priority Control of Pollutants in Water" in 1989 and implemented the "Pollution Control Standards for Wastes Containing PCBs" (GB13015-1) in 1992. In 1999, PCBs were listed in the newly promulgated "Surface Water Environmental Quality Standards" (GHZBI-1999). And the survey results show that more than 80% of the country is polluted by toxic halogenated biphenyls. It is not easy to detect because the content of these pollutants is not high. However, halogenated biphenyls are biolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/06G01N30/02
CPCG01N30/02G01N30/06G01N30/08
Inventor 叶涛李梅陈炜
Owner 安徽省佳逸环保科技有限公司