Comparison of chloride- and hydride-generation for quantitation of germanium by headspace solid-phase microextraction-inductively coupled plasma-mass spectrometry

被引：21

作者：

Guo, XM

Mester, Z ^{[1
]}

Sturgeon, RE

机构：

[1] Natl Res Council Canada, Inst Natl Measurement Standards, Ottawa, ON K1A 0R9, Canada

[2] Xiamen Univ, Dept Chem, Xiamen 361005, Peoples R China

[3] Xiamen Univ, MOE Key Lab Anal Sci, Xiamen 361005, Peoples R China

来源：

ANALYTICAL AND BIOANALYTICAL CHEMISTRY | 2002年 / 373卷 / 08期

关键词：

solid-phase microextraction (SPME); germanium; chloride generation; hydride generation; inductively coupled plasma; time-of-flight mass spectrometry;

D O I：

10.1007/s00216-002-1402-z

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Chloride- and hydride-generation headspace solid-phase microextraction (SPME) techniques have been compared for the detection of trace amounts of germanium by inductively coupled plasma time-of-flight mass spectrometry (ICP-TOFMS). The conditions for generation of germanium chloride, including acid type and concentration, effect of sodium chloride and extraction time, were investigated. Detection limits of 20 and 92 pg mL(-1) and precisions of 18% (n=11) and 9.7% (n=11) were achieved for chloride and hydride generation, respectively, at a concentration of 10 ng mL(-1). The generated germanium chloride and hydride species identities were characterized and confirmed as GeCl4 and GeH4 by use of electron-impact ionization mass spectrometry. Chloride generation coupled with SPME sampling and ICP-TOFMS detection resulted in twofold enhancement of sensitivity compared to GeH4 and detection limits for continuous hydride generation were 20-fold better than reported atomic fluorescence data.

引用

页码：849 / 855

页数：7

共 37 条

[21] Preliminary investigation of electrothermal vaporization sample introduction for inductively coupled plasma time-of-flight mass spectrometry [J].