吹扫捕集/气相色谱-质谱联用法测定生活饮用水中18种芳香烃类化合物

目的:建立生活饮用水中18种芳香烃类化合物的吹扫捕集/气相色谱-质谱联用测定方法。方法:采用吹扫捕集富集水中的苯系物,解吸后用色谱-质谱联用法测定,内标标准曲线法定量。结果:方法最低检出浓度为0.008μg/L～0.582μg/L,标准曲线相关系数均大于0.9976,响应因子的相对标准偏差小于3.87%,样品加标回收率在89.7%～106.8%之间。结论:本法干扰小、分离度好、灵敏度高、结果准确、操作简便,对多种水样适应性好,适合于生活饮用水中18种芳香烃类化合物的同时分析。

Determination of 18 aromatic compounds in drinking water by purge and trap gas chromatography/mass spectrometry

Objective:To establish a method for determination of 18 aromatic compounds in drinking water by purge and trap gas chromatography/mass spectrometry.Methods:Aromatic compounds in water were purged and trapped,then desorbed and analyzed by gas chromatography/mass spectrometry.Internal standard curve method was used for quantitation.Results:The correlation coefficients of the method for 18 target compounds were greater than 0.9976 and their minimum detection limits(MDL) were 0.008 μg/L~0.582 μg/L,the average recoveries of the method was 89.7%~106.8% with the relative standard deviation(RSD) less than 3.87%.Conclusion:This method is simple,rapid,sensitive and accurate and it is suitable for simultaneous determination of 18 aromatic compounds in drinking water.