Method for enriching and purifying organic contaminant in water

A technology of organic pollutants and purification methods, which is applied in the field of enrichment and purification of organic pollutants in water, can solve the problems of low accuracy and precision, monitoring influence, etc., and achieve the effect of high accuracy and high recovery rate

Inactive Publication Date: 2008-09-17
济南市供排水监测中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, in the solid phase extraction process, some polar or non-polar interference substances will be adsorbed and eluted together with the target substance. The accuracy and precision of this method are low, which will affect the monitoring.

Method used

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  • Method for enriching and purifying organic contaminant in water
  • Method for enriching and purifying organic contaminant in water

Examples

Experimental program
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specific Embodiment 1

[0018] This specific embodiment comprises the following steps carried out in sequence:

[0019] (1) Reverse-phase column preparation: first wash and activate the reverse-phase column with 10 mL of methanol, and then add 15 mL of ultrapure water to condition the activated reverse-phase column.

[0020] (2) Reverse-phase column enrichment: pass the water sample through the reverse-phase column at a filtration rate of 4mL / min. After the filtration is completed, wash the reverse-phase column with 12mL of methanol-water mixture (φmethanol=20%), and dry pump for 5min After that, it was eluted with 2ml of methanol.

[0021] (3) Normal-phase column preparation: wash and activate the column bed with 10 mL of methanol, and then condition the activated normal-phase column with 10 mL of methanol-water mixture (φmethanol=20%).

[0022] (4) Normal-phase column purification: Dilute the methanol eluent from reverse-phase solid-phase extraction into a methanol-water mixture (φmethanol=20%), p...

specific Embodiment 2

[0023] This specific embodiment comprises the following steps carried out in sequence:

[0024] (1) Reversed-phase column preparation: first wash and activate the reverse-phase column with 10 mL of methanol, then add 20 mL of ultrapure water to condition the activated reverse-phase column.

[0025] (2) Reverse-phase column enrichment: pass the water sample through the reverse-phase column at a filtration rate of 4.5mL / min. After the filtration is completed, wash the reverse-phase column with 11 mL of methanol-water mixture (φmethanol=20%), and dry extract After 8 min, it was eluted with 2 ml methanol.

[0026] (3) Normal-phase column preparation: wash and activate the column bed with 10 mL of methanol, and condition the activated normal-phase column with 12 mL of methanol-water mixture (φmethanol=20%).

[0027] (4) Normal-phase column purification: Dilute the methanol eluent from reverse-phase solid-phase extraction into a methanol-water mixture (φmethanol=20%), pass through ...

specific Embodiment 3

[0028] This specific embodiment comprises the following steps carried out in sequence:

[0029] (1)C 18 Reversed-phase column preparation: wash with 10mL methanol and activate C 18 Reversed-phase column, add 19mL ultrapure water to activate the C 18 Reverse-phase column conditioning.

[0030] (2)C 18 Reverse-phase column enrichment: pass the water sample through C at a filtration rate of 4.5mL / min 18 Reversed-phase column, after filtration, wash C with 14 mL of methanol-water mixture (φmethanol=20%) 18 Reversed-phase column, after 10 minutes of dry pumping, eluted with 2ml of methanol.

[0031] (3) Silica gel normal-phase column preparation: wash and activate the column bed with 10 mL of methanol, and then condition the activated normal-phase column with 15 mL of methanol-water mixture (φmethanol=20%).

[0032] (4) Silica gel normal-phase column purification: Dilute the methanol eluent from reverse-phase solid-phase extraction into a methanol-water mixture (φmethanol=20%...

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Abstract

The invention discloses a method for enriching and purifying organic pollutants in water, which comprises the following steps of: (1) performing reversed phase solid extraction of a water sample, and removing polar impurities to obtain an eluate containing organic pollutants and non-polar impurities; and (2) performing positive phase solid extraction of the eluate obtained in step (1), and removing non-polar impurities to obtain an eluate containing organic pollutants. The inventive method enriches and purifies organic pollutants in water by using 'reversed phase-positive phase' two-phase solid extraction technique. The inventive method has high accuracy and high recovery rate; and can be used for enriching and purifying organic pollutants in urban water resource water and drinking water.

Description

(1) Technical field [0001] The invention relates to a method for enriching and purifying organic pollutants in water, in particular to a method for enriching and purifying organic pollutants in water by solid phase extraction. (2) Background technology [0002] There are many types of organic pollutants in water bodies, low content, and great harm. Most of the carcinogenic, teratogenic, and mutagenic substances that are most harmful to the human body (that is, the "three-caused" substances) are in the order of μg / L or even ng / L. Therefore, in In the detection process, the first problem that needs to be solved is the pretreatment of water samples. Through effective pretreatment of water samples, the organic matter in them can be enriched and purified for subsequent instrumental analysis. [0003] Common methods for sample pretreatment include liquid-liquid extraction, headspace, liquid-solid extraction, purge and trap, solid phase extraction, solid phase microextraction, etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26
Inventor 贾瑞宝孙韶华陈家全吕玲玲
Owner 济南市供排水监测中心
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