Direct, Continuous Hydride Generation Coupled with Microwave Induced Plasma-Atomic Emission Spectrometry for the Determination of Selenium
作者:
KinC. Ng,
Xia-Xiu Xu,
MichaelJ. Brechmann,
期刊:
Spectroscopy Letters
(Taylor Available online 1989)
卷期:
Volume 22,
issue 9
页码: 1251-1262
ISSN:0038-7010
年代: 1989
DOI:10.1080/00387018908054021
出版商: Taylor & Francis Group
关键词: Microwave Induced Plasma;Hydride Generation;Atomic Emission Spectrometry;Selenium Detection.
数据来源: Taylor
摘要:
Selenium is determined by atomic emission technique with microwave induced helium plasma as the excitation source. A continuous hydride generation system using a peristaltic pump, an effective serpentine hydride generator and a gas-liquid separator is developed and interfaced to the He-plasma. The selenium hydride and the reaction by-products are carried directly and continuously by the He carrier gas (0.6 L/min) into the plasma sustained in a tangential torch. The power level is 100 W and the tangential helium flow-rate is 4.5 L/min. The detection limit (3 0) is 40 ppb, the linear dynamic range is over three orders of magnitude, and the precision is 6.7% RSD for a 1 ppm solution. Applications to a soil sample showed comparable results to a conventional hydride generation atomic absorption system.
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