GC/MS分析环境样品中的多氯联苯(PCBs)

多氯联苯（ｐｏｌｙｃｈｌｏｒｉｎａｔｅｄ Ｂｉｐｈｅｎｙｌｓ，简称ＰＣＢｓ）系一组化学性质极其稳定的氯代烃类化合物，由于难降解，可通过食物链而富集且直接危害人类的健康，因此，这类化合物已成为全球性的重要污染物之一。利用圆盘型固相萃取－ＧＣ－ＭＳ测定水样中的ＰＣＢｓ，同时采剂超声萃取－ＧＣ－ＭＳ分析了各种土壤样品和植物样品中的ＰＣＢｓ，实验结果证明分析方法中样品前处理过程简单、方法回收较高，重现性好，然质联用能够测定ＰＣＢｓ的同系物。另外，由已有的数据可以看出，中国土壤中存在有一定量的ＰＣＢｓ，特别是在一些特定污染地区的土壤中ＰＣＢｓ的浓度较高，另外，由于土壤的污染还影响到水和植物的污染。

Analysis of PCBs in Environmental Samples by GC-MS

Polychlorinated biphenyls (PCBs) are a class of chlorinated hydrocarbon compounds with high chemical stability. Since PCBs do not readily degrade in the environment and threaten the health of human beings by bioaccumulation through food chain, they have become one of the most important contamination compounds in the world. Solid phase extraction and GC MS were used to determine PCBs in water samples. Meanwhile PCBs in various soil samples and plant samples were analyzed by supersonic extraction and GC-MS. Simple sample pretreatment, good recovery and reappearance have been proved. The data available here have showed that certain PCBs exist in various soils. Higher concentration of PCBs present in some polluted samples. Water quality and plants were threatened by soil pollution.