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Analytical performance of a low-gas-flow torch optimized for inductively coupled plasma atomic emission spectrometry

Analytical Chemistry
By: , , , , , , and 
https://doi.org/10.1021/ac00266a037

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Abstract

An inductively coupled Ar plasma (ICP), generated in a lowflow torch, was investigated by the simplex optimization technique for simultaneous, multielement, atomic emission spectrometry (AES). The variables studied included forward power, observation height, gas flow (outer, intermediate, and nebulizer carrier) and sample uptake rate. When the ICP was operated at 720-W forward power with a total gas flow of 5 L/min, the signal-to-background ratios (S/B) of spectral lines from 20 elements were either comparable or inferior, by a factor ranging from 1.5 to 2, to the results obtained from a conventional Ar ICP. Matrix effect studies on the Ca-PO4 system revealed that the plasma generated in the low-flow torch was as free of vaporizatton-atomizatton interferences as the conventional ICP, but easily ionizable elements produced a greater level of suppression or enhancement effects which could be reduced at higher forward powers. Electron number densities, as determined via the series until line merging technique, were tower ht the plasma sustained in the low-flow torch as compared with the conventional ICP. ?? 1984 American Chemical Society.
Publication type Article
Publication Subtype Journal Article
Title Analytical performance of a low-gas-flow torch optimized for inductively coupled plasma atomic emission spectrometry
Series title Analytical Chemistry
DOI 10.1021/ac00266a037
Volume 56
Issue 2
Year Published 1984
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Analytical Chemistry
First page 283
Last page 288
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