COMPUTER-CONTROLLED SOURCE FOR ATOMIC EMISSION-SPECTROMETRY

被引：1

作者：

ARYAMANYAMUGISHA, H ^{[1
]}

WILLIAMS, RR ^{[1
]}

GREEN, RB ^{[1
]}

机构：

[1] OHIO UNIV,DEPT CHEM,ATHENS,OH 45701

来源：

ANALYTICAL CHEMISTRY | 1988年 / 60卷 / 07期

关键词：

ELECTRODES - Tungsten - HELIUM - VALVES AND VALVE GEAR - Computer Applications;

D O I：

10.1021/ac00158a016

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The utility of a computer-controlled, high-voltage low-current (35 ma) microarc as a source for trace metal analysis has been investigated. It uses a pair of 0. 10 mm diameter tungsten electrodes operating in a helium atmosphere. The stability of the system has been optimized by eliminating oxygen and pressurizing the plasma cell. This was accomplished by connecting a computer-controlled valve to the exit side of the microarc to control the flow of the support gases. Detection limits of most elements studied improved by 1 order of magnitude and arc temperature increased from 5200 to 6700 K after this modification.

引用

页码：679 / 683

页数：5