吹扫捕集-气质联用法监测水中挥发性有机物

Monitoring of Volatile Organic Compounds in Water by Blow and CaptureGas chromatography-mass spectrometry

了解水体中VOCs的存在和浓度情况,可以帮助评估水质安全、预防污染传播以及发现潜在的危害源。本文结合地表水站VOCs运维项目,通过全自动VOCs监测系统,成功建立了一种吹扫捕集气质联用方法来监测地表水中54种挥发性有机物。结果表明该方法的线性系数在0.991~1.000之间,检出限范围为0.09~0.38μg/L,重复性为3.4%~12.8%,加标回收率为95.3%~104.2%。此方法便于操作、反应迅速,可用来同时监测地表水中的54种挥发性有机物。这项研究为地表水中挥发性有机物的监测和分析提供了一种可靠的方法,为水质监测和预警提供技术支持,具有一定的应用推广价值。

Understanding the presence and concentration of volatile organic compounds(VOCs)in water bodies is essential for evaluating water quality safety,preventing pollution propagation,and identifying potential sources of hazards.This study combines VOCs maintenance projects at surface water stations and successfully establishes a purge and trap gas chromatography-mass spectrometry(GC-MS)method to monitor 54 volatile organic compounds in surface water.The results demonstrate that the method exhibits excellent linearity with correlation coefficients ranging from 0.991 to 1.000.The detection limits fall within the range of 0.09~0.38μg/L,and the repeatability ranges from 3.4%to 12.8%.Moreover,the recovery rates are between 95.3%and 104.2%.This method is user-friendly,offers rapid response,and can simultaneously monitor 54 volatile organic compounds in surface water.This research provides a reliable method for monitoring and analyzing volatile organic compounds in surface water,offering technical support for water quality monitoring and early warning,and holds significant potential for application and dissemination.