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A kind of pretreatment method of nitrosamine compound in water sample and its suspension

A technology of nitrosamines and suspended solids, applied in the field of water treatment, can solve the problems of small extraction volume, high detection limit, and less research on nitrosamine compounds, and achieve large extraction volume and high enrichment degree of water samples Effect

Inactive Publication Date: 2017-12-29
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Description
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Problems solved by technology

However, the extraction water samples of these methods are mostly 0.5L ~ 1L, the extraction volume is small, and the detection limit is high.
At the same time, there are few studies on nitrosamine compounds in suspended matter in water

Method used

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  • A kind of pretreatment method of nitrosamine compound in water sample and its suspension

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Embodiment example 1

[0033] 1) Preparation of water samples: collect 4L of ancient well water samples in a brown glass bottle (with a Teflon cap), add sodium thiosulfate for desulfurization, pass the water samples through a glass fiber filter membrane with a pore size of 1 micron, and filter the suspended matter in the water samples immediately onto the filter membrane; use a brown sample glass bottle to seal and store the filter membrane at -20°C; store the water sample at 0-10°C;

[0034] 2) Addition of recovery rate substance: before the water sample passes through the column, add the recovery rate substance NDMA-d 6 50ng.

[0035] 3) Extraction of nitrosamine substances in water samples

[0036] ①Wash the PTFE transfer tube with methanol and ultrapure water;

[0037] ②Installation and activation of the small column: install the 6ml / 2g coconut shell activated carbon extraction column on the solid phase extraction device, and activate the extraction column with 3ml of dichloromethane, 6ml of m...

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Abstract

The invention belongs to the field of water treatment, and in particular relates to a pretreatment method for nitrosamine compounds in water and its suspended matter. The steps of the pretreatment method include: 1) obtaining a water sample and its suspended matter; 2) extracting nitrosamine compounds in the water sample; 3) extracting nitrosamines in the water sample suspended matter. The pretreatment method of the present invention covers the pretreatment process extraction of nitrosamine compounds in water samples and their suspended matter, and provides support for more accurate and comprehensive determination of the concentration level of nitrosamine compounds in water bodies; at the same time, The pretreatment method also has the advantages of a large amount of water sample extraction and a high degree of enrichment of nitrosamine compounds in the treated sample, which is beneficial to subsequent detection.

Description

technical field [0001] The invention belongs to the field of water treatment, and in particular relates to a pretreatment method for nitrosamine compounds in water and its suspended matter. Background technique [0002] Nitrosamine compounds have strong carcinogenicity and mutagenicity, and they mostly exist in the ppt concentration range in water bodies, so it is difficult to detect them accurately and quantitatively. Among them, compounds such as N-dimethylnitrosamine (NDMA) and N-methylethylnitrosamine (NMEA) are easily soluble in water, so they mostly exist in water bodies, and N-dipropylnitrosamine (NDPA) , N-nitrosopyrrolidine (NPYR) and other compounds are relatively insoluble in water and mostly exist in suspended matter in water. In recent years, the research on nitrosamine compounds has mostly focused on the content of nitrosamine compounds in drinking water, and there has been no research on suspended solids in water. At present, for the detection of nitrosamine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/34G01N1/40G01N30/08
Inventor 祁士华陈文文黄焕芳朱雪涛江晓宇
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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