吹扫捕集／毛细管气相色谱一质谱法同时测定生活饮用水中12种氧苯类化合物的研究

建立了吹扫捕集法浓缩样品中的氯苯类化合物，气相色谱一质谱法测定生活饮用水中12种氧苯类的方法。经色谱分离后用质谱检测器测定，外标法定量。利用中等极性毛细管柱（DB624，30m×0．25mm×0．25μm）程序升温。达到12种氯苯的分离效果。该方法的检出限范围为0．031～0．78μg／L，标准曲线相关系数为0．997～0．999，相对标准偏差为3％～11％，实际水样加标回收率为75％～107％。本文建立的方法简单，重现性好、检出限低，适用于水中氧代苯类化合物的测定。

Determination of Chlorobenzenes in Drinking Water by Headspace Gas Chromatographywith Capillary Column

Determination of 12 kinds of Chlorobenzene in drinking water was established by gas chromatography/mass spec- trometry. Chlorinated benzene compounds were extracted by purge-and-trap, separated by GC and determined by MS. Medium polarity capillary column （ DB624,30 m ×0. 25 mm × 0. 25μm）and temperature programming were adopted. Twelve chlo- robenzenes were sepm＇ated well. The method detection limits were 0. 031 ～ 0. 78 μg/L. The linear range was 0. 997 ～ 0. 999. The relative standard deviation was 3% ～ 11% and recovery ranged 75% ～ 107% . The method established in the present paper was simple ,precious ,accuracy and sensitive and applicable to the determination of chlorinated benzene compounds in water.