提出了气相色谱-质谱法测定水中挥发性卤代烃和氯苯类化合物的方法.样品用Trap Vocarb 3000及高纯氦吹扫、捕集及热解吸后,于气相色谱-质谱分析仪测定,外标法定量.18种卤代烃和氯苯的质量浓度与其峰面积在一定的浓度范围内呈线性关系,方法的检出限(3S/N)小于0.06 μg·L-1.标准加入回收率在92.6%~98.1%之间,相对标准偏差(n=6)均低于8.5%.

Gas chromatography in hyphenation with mass spectrometry was applied to the determinations of volatile halohydrocarbons and chlorobenzenes in water samples.The analytes were purged and trapped,and thermodesorbed using the Trap Vocarb 3000 with high-purity helium.External standard calibration was adopted in the determination.Linear relationships between peak areas and mass concentrations of 18 volatile halohydrocarbons and chlorobenzenes were obtained in a definite range,with detection limits (3S/N)less than 0.06 μg·L-1.Tests for recovery and precision were made by standard addition method,values of recovery found were in the range of 92.6%-98.1% and values of RSD′s (n=6) were less than 8.5%.