摘要
用氢化物发生顶空固相微萃取法富集了农田土壤中的甲基汞和乙基汞，并以毛细管气相色谱－ 原子吸收法进行了测定。使用ＳＰＢ－ １ 毛细管柱在４ ｍｉｎ 内可基线分离氢化甲基汞和氢化乙基汞。分离后的组分经原子吸收测定，甲基汞和乙基汞的检测限分别为２３ ｎｇ 和１７ ｎｇ ，线性范围分别为０ ～２０ μｇ 和０ ～１６ μｇ ，方法的重现性实验，ＲＳＤ（ｎ ＝ ６） 为２ ．９ ％ 和３ ．８ ％ ，标准加入回收实验，回收率分别为９３ ．８ ％ 和９４ ．７ ％ 。方法操作简便，无有机溶剂污染，可用于复杂基体中有机汞的分离测定。
Derivatization by hydride generation, separation by solid phase micro extraction and determination by capillary gas chromatography atomic absorption spectrometry of methyl- and ethyl- mercuries in field soil is described in this paper. Using SPB 1 capillary column with temperature programming, methyl- and ethyl- mercuries hydrides can be base-line separated within 4 min. The detection limits are 23 ng for MeHgH with the linear range of 0～20 μg and 17 ng for EtHgH with the linear range of 0～16 μg. The recoveries for MeHgH and EtHgH are 93.8% and 94.7% with precision of 2.9% RSD and 3.8% RSD respectively. The method is simple, solvent free and can be used for the determination of methyl- and ethyl- mercuries in samples with various matrixes.
出处
《岩矿测试》
CAS
CSCD
北大核心
1999年第4期259-262,共4页
Rock and Mineral Analysis
基金
国家自然科学基金
中国科学院资助
关键词
固相微萃取
甲基汞
乙基汞
土壤
气相色谱
solid phase micro extraction
gas chromatography atomic absorption spectrometry(GC AAS)
field soil
methyl mercury(MeHgH)
ethyl mercury(EtHgH)
