吹扫捕集-气相色谱/质谱法对饮用水源地中痕量苯系物的测定?

Determination of Trace Benzene Series in Drinking Water Sources by Purge-and-Trap Gas Chromatography-Mass Spectrometry

对饮用水源地中七种苯系物浓度痕量变化情况进行监测,采用吹扫捕集-气相色谱/质谱联用,对各七种组分的分离良好,浓度在(0.2～4.0)μg/L范围内标准曲线线性良好,精密度的相对标准偏差为2.92%～6.42%,加标回收率为92%～105%,该法可靠且满足水质分析要求,能及时准确掌握饮用水源地水中苯系物的浓度痕量变化情况,便于预警预报。

Trace changes of seven BTEXs in drinking water sources were timely monitored.Purge-and-trap gas chromatography-mass spectrometry was used to simultaneously determine the effect of 7 kinds of BTEX.The standard curve has good linearity in(0.2~4.0)μg/L.The range of the lowest relative standard deviation limit on precision was 2.92%~6.42%.The method recovery of standard addition is 92%~105%.The method has advantages of high sensitivity and met the demands of environmental quality standards of surfaces water.The method is very beneficial to accurately grasp the concentration trace change of BTEX in the drinking water source water in time,and is convenient for early warning and prediction.