[目的]测定水基胶中的苯系物.[方法]分别对不同的前处理方法、溶剂、预空平衡时间和平衡温度进行比较选择,并采用气质联用法/SIM测定水基胶中的苯、甲苯、乙苯、邻二甲苯、间二甲苯、对二甲苯.[结果]N,N-二甲基甲酰胺为最佳溶剂,顶空条件为最佳前处理手段,且其最佳平衡温度80℃,最佳平衡时间15 min；该方法的回收率为96.96％～105.19％,RSD为1.082％～2.082％,定量限为0.003 ～0.016 mg/kg.[结论]顶空-气质联用法前处理简单、污染小,方法简单、快速,具有较高的灵敏度和准确度,测定结果准确、可靠.%[Objective] To determine the BTEX in gluewater. [Method] Different pretreatment methods, solvents, the balance time and the balance temperature of headspace were compared. A method of GC/MS/SIM was used to to determine the contents of benzene, toluene, ethyl benzene, p-xylene, m-xylene and o-xylene in the gluewater. [Result] N,N-dimethylformamide was the first solvent. Headspace was the best of all pretreatment methods, and the best balance time was 80 ℃ , the best balance temperature was 15 min. The recovery of the method was from 96. 96% to 105. 19% with RSD of 1.082% to 3.288% , and the limits of detection was from 0. 003 to 0.016 mg/kg. [ Conclusion] The HS-GC/MS method is simple and rapid with simple pretreatment, little pollution, high accuracy and sensitivity, its determination results are reliable and accurate.
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