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Method for simultaneously and rapidly determining contents of various organic chlorine pesticides in water

A technology for rapid determination and determination method, which is applied in measurement devices, instruments, scientific instruments, etc., can solve the problem that solid-phase extraction cannot meet the simultaneous analysis and determination of samples, and achieves simple and easy processing methods, low processing costs, and simple methods. Effect

Inactive Publication Date: 2016-05-11
WUXI HUANCHUANG ENVIRONMENT TECH DEV
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AI Technical Summary

Problems solved by technology

Multi-residue detection is the focus of current development. Sometimes a single solid-phase extraction cannot meet the simultaneous analysis and determination of samples. Sampling uses a series of solid-phase extraction columns to enrich and purify the water to be tested, and then conducts gas chromatography analysis. It is a feasible method for water quality analysis. method

Method used

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  • Method for simultaneously and rapidly determining contents of various organic chlorine pesticides in water
  • Method for simultaneously and rapidly determining contents of various organic chlorine pesticides in water
  • Method for simultaneously and rapidly determining contents of various organic chlorine pesticides in water

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Embodiment 1

[0027] Embodiment 1: Sampling and analysis of organochlorine pesticide residues in groundwater in a certain area along the southeast coast of China was carried out. The specific analysis steps are as follows:

[0028] (1) Solid-phase extraction: use two solid-phase extraction columns in series to enrich organochlorine pesticides contained in 1 liter of water sample; among them, the solid-phase extraction column is a C18 solid-phase extraction column and an HLB solid-phase extraction column. The phase extraction columns were connected in series; the flow rate of the water sample was kept at 2-3mL / min, and the column was kept wet throughout the process.

[0029] (2) Elution: the solid-phase extraction column is eluted successively with 5 mL each of methanol and acetone;

[0030] (3) Concentration: Concentrate the eluent by nitrogen purging, add 5 mL of n-hexane to the concentrated solution, and then concentrate to 1 mL by nitrogen purging to obtain a sample;

[0031] (4) Detect...

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Abstract

The invention discloses a method for simultaneously and rapidly determining contents of various organic chlorine pesticides in water, and belongs to the field of organic chlorine pesticide detection. The method comprises the steps of series-connection solid-phase extraction column extraction, solvent elution, concentration to a definite volume, and qualitative and quantitative detection performed on a sample to be tested by means of a gas chromatography-electronic capture detector. By building and optimizing series-connection solid-phase extraction column extraction enrichment purification and conditions detected by the gas chromatography-electronic capture detector, 25 kinds of organic chlorine pesticides can be rapidly and accurately determined at the same time, and the method has the excellent precision and sensitivity and overcomes the technical detects in the field.

Description

technical field [0001] The invention relates to the detection field of organochlorine pesticide content, specifically, a method for quickly measuring the content of 25 kinds of organochlorine pesticides in a water body at the same time. Background technique [0002] Organochlorine pesticides have been widely used in the last century because of their powerful broad-spectrum insecticidal effects. However, due to their long persistence, strong accumulation and hormone effects, they have potential hazards to the ecological environment and human health. At present, the vast majority of organochlorine pesticides are included in the list of persistent organic pollutants, so they are gradually banned or restricted by countries all over the world. Although most organochlorine pesticides have been banned for many years in the last century, they are still detected to a certain level in environmental media, organisms and even human bodies around the world. With the understanding of org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 孔德洋陆隽鹤何健许静
Owner WUXI HUANCHUANG ENVIRONMENT TECH DEV
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