摘要
以巯基棉（ＳＣＦ）为吸附剂，用柱上富集技术，浓缩富集水中的烷基汞（氯代甲基汞，氯代乙基汞）。用少量的２ｍｏｌ／ＬＨＣｌ洗脱，用甲苯作萃取剂从洗脱液中萃取烷基汞。对于简单水体，该有机相可直接用于气相色谱测定；对于复杂水体，采用反萃取的方法测定，即可进一步浓缩，又可减少背景峰。用玻璃填充柱－电子捕获检测器响应的气相色谱法测定，最低检测限为８．６×１０￣（－１２）ｇ，可检测到废水中０．３４ｎｇ／Ｌ的单一烷基汞（２．５Ｌ水样）。对样品的保存条件也作了探索。
The alkyl mercury in waste water was preconcentrated on sulfhydryl cotton packed column,and eluted with a small volume of 2 mol/L HCl solution, then extracted with toluene.The alkyl mercury in the organic phase was analyzed by GC using a glass-packed column and a electron-capture detector with a detection limit of 8.6×10￣(-12)g. For complicated sample,the toluene layer should extracted with 0.025 mol/L Na_2S_2O_3 then 0.05 mol/L CuCl_2 and 2 mol/L HCl were added and reextracted with toluene and determined by GC.
出处
《分析测试学报》
CAS
CSCD
1996年第2期28-33,共6页
Journal of Instrumental Analysis
