Pretreatment method of volatile organic compounds in environment water

Abstract

A pretreatment method of volatile organic compounds in environment water comprises the following steps: discharging 500-1000ml of water, adjusting the water flow to 500ml / min, acquiring a water sample by using a sampling bottle, filtering the water sample by a 0.45[mu]m filter membrane, packaging, and storing the water sample in a shady place; activating extraction columns by using 2ml of dichloromethane, 2ml of ethyl acetate, 5ml of methanol and 10ml of pure water respectively; and adding about 40-50mg of sodium sulfite to the above chlorine-containing water sample in order to remove remaining chlorine, and carrying out cold storage. Compared with the prior art, the method adopting solid phase extraction to detect the environment water in the invention has the advantages of small use amount of organic solvents, high sensitivity, accurate multi-component qualitation, simple and rapid operation, and the like. Matrix standard added recovery experiments show that the detection limit, the linear relation, the recovery rate, the reappearance and other methodological indexes of the method can meet detection requirements of SVOCs in water.

Description

technical field [0001] The invention relates to the technical field of water body detection, in particular to the pretreatment of volatile organic compounds in environmental water bodies. Background technique [0002] In the protection of water sources, one of the most prominent problems is the lack of monitoring data of organic pollution in water sources, the inability to fully grasp the pollution situation faced by water sources, the cause of pollution, the source of pollution, and the inability to formulate effective measures. The laws and regulations and related countermeasures for water source protection, the poor water quality tracking and monitoring capabilities of each water source, and the lack of available monitoring data have become a major problem restricting the smooth progress of water source protection. [0003] Volatile organic pollutants are common organic pollutants in water. They mainly come from factory wastewater discharge, urban sewage discharge and tap...

AI Technical Summary

Problems solved by technology

The traditional purge and trap is widely used in the analysis of VOCs in environmental water due to its advantages of high enrichment efficiency, low pollution, and easy operation, but the purge and trap instruments are expensive and costly to use