【摘要】 对顶空气相色谱法 (HSGC)测定水中微量的氯仿和四氯化碳的实验条件进行了探讨 ,找出了减少试剂空白的简易方法 .所设计的分析方法具有步骤简单、分析时间短、取样体积少、易于排除干扰等优点 .与有机溶剂萃取气相色谱法相比 ,方法的灵敏度大约可提高 1 0 0 0倍 .对 CCl4 的检出限低于 0 .1 μg/L,准确性也比较好 ,完全能够满足按生活饮用水国家标准对水质进行监测的要求更多还原

【Abstract】 Trace chloroform and carbon tetrachloride from aqueous solutions are analysed by headspace gas chromatography with filled glass column and electron capture detector.Calibration by external standard techniques is discussed. The sensitivity of HSGC is about 1000 times higher than that of extraction method. The analysis results of carbon tetrachloride showed detection limit of 0.1 μg/L, relative standard deviation (RSD) of 5% and recoveries of>80%, which is considered satisfactory for drinking water monitoring.更多还原