摘要
建立了一种基于蒸馏-乙基化结合气相色谱(GC)-冷原子荧光(CVAFS)测定天然水体中甲基汞的分析方法.水样中甲基汞经蒸馏后与四乙基硼化钠反应生成挥发性的甲基乙基汞,由氮气吹扫捕集于Tenax管,然后由GC-CVAFS测定.该方法的回收率为88.2%～108.4%,平均相对标准偏差为5.4%.45mL水样测定的最低检出限为0.009ng/L.
An analysis technique is established for determination of methyl mercury in natural water based on the distillation-ethylation combined with gas chromatography (GC)-cold vapor atomic fluorescence spectrometer (CVAFS). Methyl mercury in water sample reacted with sodium tetraethyl borate after distillation, forming volatile methylethyl mercury, catched and concentrated in by nitrogas gas blowing; then determined with GC-CVAFS. The recovery rate of the technique is 88.2%~108.4%, and the average relative standard deviation is 5.4%. The methyl mercury detection limit is 0.009ng/L for 45mL sample determined.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2004年第5期568-571,共4页
China Environmental Science
基金
中国科学院"海外杰出人才引进计划"
国家自然科学基金资助项目(40173037
40203009
40273041)
关键词
甲基汞
蒸馏
乙基化
气相色谱
冷原子荧光
methyl mercury
distillation
ethylation
gas chromatography
cold vapour atomic fluorescence spectrometer
