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目的:建立生活饮用水中二氯苯、三氯苯、五氯苯、六氯苯及六氯丁二烯的顶空气相色谱(HS-GC)测定方法。方法:水中微量的二、三、五、六氯苯、六氯丁二烯经顶空提取后,应用Rtx-1701毛细管色谱柱采用程序升温方式进行GC分析,以保留时间定性,外标法定量。结果:1,3-二氯苯、1,4-二氯苯、1,2-二氯苯、1,3,5-三氯苯、1,2,4-三氯苯、六氯丁二烯、1,2,3-三氯苯、五氯苯、六氯苯的线性范围分别为0.38μg/L~40.0μg/L、0.96μg/L~100.0μg/L、0.42μg/L~70.0μg/L、0.03μg/L~5.0μg/L、0.04μg/L~9.0μg/L、0.004μg/L~0.60μg/L、0.03μg/L~6.0μg/L、0.01μg/L~2.0μg/L、0.02μg/L~2.0μg/L,检出限分别为0.11μg/L、0.29μg/L、0.13μg/L,0.009μg/L,0.012μg/L,0.001μg/L,0.009μg/L,0.004μg/L,0.006μg/L,水样加标回收率为100%~114%,RSD为1.0%~2.9%。结论 :该法操作简便,准确、灵敏度高,不需使用有机溶剂,适用水中氯苯类化合物及六氯丁二烯的测定。
Objective: To establish a method for the determination of dichlorobenzene, trichlorobenzene, pentachlorobenzene, hexachlorobenzene and hexachlorobutadiene in domestic drinking water by headspace gas chromatography (HS-GC). METHODS: Microamounts of II, III, V, HCB and HCBD in water were subjected to headspace extraction. GC analysis was performed on a Rtx-1701 capillary column using a programmed temperature-programmed method. The retention time was qualitative and the external standard method was used for quantification . Results: 1,3-Dichlorobenzene, 1,4-Dichlorobenzene, 1,2-Dichlorobenzene, 1,3,5-trichlorobenzene, 1,2,4-trichlorobenzene, The linear ranges of alkene, 1,2,3-trichlorobenzene, pentachlorobenzene and hexachlorobenzene were 0.38μg / L ~ 40.0μg / L, 0.96μg / L ~ 100.0μg / L, 0.42μg / L ~ 70.0 μg / L, 0.03 μg / L to 5.0 μg / L, 0.04 μg / L to 9.0 μg / L, 0.004 μg / L to 0.60 μg / L, 0.03 μg / L to 6.0 μg / L, 0.01 μg / L to 2.0 The detection limits were 0.11μg / L, 0.29μg / L, 0.13μg / L, 0.009μg / L, 0.012μg / L, 0.001μg / L and 0.009 μg / L, 0.004 μg / L and 0.006 μg / L. The recoveries of spiked water samples ranged from 100% to 114% with RSD ranging from 1.0% to 2.9%. Conclusion: The method is simple, accurate, sensitive and does not require organic solvents for the determination of chlorobenzene and hexachlorobutadiene in water.