巯基棉富集-大口径毛细管气相色谱法测定水样中痕量烷基汞  

Determination of Methylmercury and Ethylmercury in Environmental Water by Megabore Capillary Gas Chromatography after Preconcentration

作　　者：佟柏龄 李新纪[2] 

机构地区：[1]地矿部岩矿测试技术研究所,北京100037 [2]北京市环境保护监测中心,北京100044

出　　处：《岩矿测试》1993年第2期131-134,共4页Rock and Mineral Analysis

摘　　要：介绍了巯基棉富集-大口径毛细管柱气相色谱法测定环境水中痕量烷基汞的分析方法,并与玻璃填充柱色谱分离烷基汞进行了对比。取1000ml环境水样时,本法的检出限为:甲基汞(MMC)0.5pg;乙基汞(EMC)0.7pg。Methylmercury and ethylmercury at 0. x pg levels were preconcentrated into a sulphydryl cotton fiber adsorbent and elutes with a mixture of Imol/L hydrochloric acid and 2mol/L sodium chloride. The elute.was extracted with benzene. Analysis was performed by megabore capillary gas chromatography with electron capture detector. A comparison wasmade between results of capillary chromatography and results of packed column chromatography. The results show that capillary column analysis is superior to packed column analysis. The detection limit for methylmercury was 0. 5 pg and for ethylmercury was 0. 7 pg.

关 键 词：烷基汞 巯基棉 毛细管 环境水 水样 

分 类 号：O661.1[理学—分析化学]