UV/spray chamber for generation of volatile photo-induced products having enhanced sample introduction efficiency

被引：64

作者：

Sturgeon, RE ^{[1
]}

Willie, SN ^{[1
]}

Mester, Z ^{[1
]}

机构：

[1] Natl Res Council Canada, Inst Natl Measurement Stand, Ottawa, ON K1A 0R6, Canada

来源：

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY | 2006年 / 21卷 / 03期

关键词：

D O I：

10.1039/b517884c

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A combined spray chamber/UV photolysis unit is described which is shown to substantially enhance sample introduction efficiency for several elements in the presence of 1 - 5% concentrations of formic, acetic and propionic acids. Enhancement factors of 2 - 40-fold were achieved for Ag, As, Se, Sb, Hg, I, Bi, Pb and Sn when the aerosol field within the cyclonic chamber produced during conventional concentric nebulizer sample introduction was illuminated by an axially placed 6 W mercury pen lamp. UV photolysis of the organic acids likely initiates radical reactions, generating volatile analyte species.

引用

页码：263 / 265

页数：3

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