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Detection method of trace persistent organic pollutants in water

A technology of organic pollutants and detection methods, applied in the field of analysis and detection, can solve the problems that trace organic matter cannot be effectively carried out, and achieve the effect of high concentration of water samples, reduction of losses, and improvement of enrichment efficiency

Inactive Publication Date: 2018-01-09
SHANDONG WATER & WASTEWATER MONITORING CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there are many pretreatment methods (liquid-liquid extraction, solid phase extraction) that can be pretreated and enriched, the detection of trace organic compounds cannot be carried out effectively due to the limitation of the sampling volume of the method, the enrichment factor of water samples and other factors.

Method used

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  • Detection method of trace persistent organic pollutants in water
  • Detection method of trace persistent organic pollutants in water
  • Detection method of trace persistent organic pollutants in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Experimental water quality: laboratory pipe network water samples, through the following steps to detect POPs in laboratory pipe network water.

[0025] Take 20L of high-purity water, pump it into the water tank of the reverse osmosis device, turn on the water pump circulation, the circulation flow rate is 6LPM, and after 10 minutes of circulation, open the concentrated water valve to release the enriched concentrated water containing protective liquid and impurities. Repeat the cleaning 4 times until the reverse osmosis membrane is cleaned.

[0026] Take 100L of faucet water from the laboratory pipe network, pour it into the reverse osmosis water tank, and start the reverse osmosis cycle of the water sample, with a circulation rate of 8LPM. When about 3L of water sample remains in the reverse osmosis water tank, the circulation is stopped, the enriched concentrated water is released from the concentrated water valve, and the measuring cylinder is quantified. Repeat th...

Embodiment 2

[0036] Comparison experiment between reverse osmosis-solid phase extraction technology and single solid phase extraction technology, experimental water quality: laboratory pipe network water spiked with 1,2-dichlorobenzene, spiked concentration: 2×10 -6 mg / L, the spiked water samples were measured in parallel three times.

[0037] (1) Reverse osmosis-solid phase extraction water sample treatment:

[0038] Take 20L of high-purity water, pump it into the water tank of the reverse osmosis device, turn on the water pump circulation, the circulation flow rate is 6LPM, and after 10 minutes of circulation, open the concentrated water valve to release the enriched concentrated water containing protective liquid and impurities. Repeat the cleaning 4 times until the reverse osmosis membrane is cleaned.

[0039] Take 100L of faucet water from the laboratory pipe network. After the water sample is spiked, put it into the reverse osmosis water tank, and start the reverse osmosis cycle of ...

Embodiment 3

[0054] Experimental water quality: laboratory pipe network water 1,2,3-trichlorobenzene, 1,3,5-trichlorobenzene spiked, spiked concentration: 2×10 -5 mg / L, the spiked water samples were measured in parallel three times. The water sample reverse osmosis treatment and detection steps are the same as in Example 1.

[0055] Take 20L of high-purity water, pump it into the water tank of the reverse osmosis device, turn on the water pump circulation, the circulation flow rate is 6LPM, and after 10 minutes of circulation, open the concentrated water valve to release the enriched concentrated water containing protective liquid and impurities. Repeat the cleaning 4 times until the reverse osmosis membrane is cleaned.

[0056] Take 100L of faucet water from the laboratory pipe network. After the water sample is spiked, put it into the reverse osmosis water tank, and start the reverse osmosis cycle of the water sample, and the cycle flow rate is 8LPM. When about 3L of water sample remai...

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Abstract

The invention discloses a detection method of trace persistent organic pollutants in water. The trace persistent organic pollutants in the water are detected by adopting a reverse osmosis-reverse phase solid phase extraction-GC-MS (gaschromatographic mass spectrometry) technology. The detection method comprises the following steps: concentrating and enriching a water sample through reverse osmosistreatment; treating concentrated water after enrichment through reverse phase solid phase extraction, and collecting persistent organic pollutant components in the water; detecting the persistent organic pollutants in the collected water sample by adopting the GC-MS technology, determining the nature according to the retention time of a chemical compound and selected ions, determining the quantity according to the peak area of the tested chemical compound, and obtaining the concentration of a to-be-detected object in the sample according to a standard curve. According to the detection method,the enrichment times of trace organic matters can be effectively increased, the loss of the trace components is reduced, and the detection rate of the trace components is increased.

Description

technical field [0001] The invention belongs to the field of analysis and detection, and relates to a method for detecting POPs in water, which is mainly used for detecting POPs in water. Background technique [0002] The organic pollutants in the water environment have a wide range of sources and various types, and in recent years, new persistent organic pollutants have continuously appeared, which has attracted more and more attention. At present, the organic pollutants that are widely concerned mainly include: nitrosamines, nitroaromatics, endocrine disruptors and drug antibiotics. The organic pollutants of concern in the environment are characterized by persistence, bioaccumulation, migration, and high toxicity, and many even have triple effects of carcinogenicity, teratogenicity, and mutagenesis. They generally exist in trace amounts (μg / L or ng / L) in the water environment, but due to bioaccumulation, they will pose a great potential threat to the water environment sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N30/08
Inventor 贾瑞宝孙韶华王永朝王明泉宋艳
Owner SHANDONG WATER & WASTEWATER MONITORING CENT
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