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Issue 9, 2002
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Spectral and non-spectral interferences in the determination of selenium by inductively coupled plasma atomic emission spectrometry

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Abstract

Spectral and non-spectral interferences observed in the determination of selenium by ICP-AES were investigated in this study. The identity of the carbon-induced emission peak that interferes on the Se 196.090 nm analytical line was clarified. It was found that this peak was not a part of a CN band but most likely belongs to a spectral band emitted by the CO molecule. Non-spectral interferences of matrix elements C, S, P and Br assisting in the enhancement of selenium emission were found. Concentration dependences of these matrix effects were measured in the range of 0.5–20 g L−1 of the matrix element and 0.1–100 mg L−1 of Se. No enhancement of the Mg I 285.213 nm line was observed when the influence of these matrix elements on magnesium was monitored for comparison at the same time. The enhancement of selenium emission was about 50% in the most significant case (sulfur, 10 g L−1). A similar effect was observed when gaseous compounds of C and S were introduced into the ICP. The mechanism of this matrix effect was studied and partially clarified as being probably related to ionization of matrix elements.

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Article information


Submitted
01 Mar 2002
Accepted
09 May 2002
First published
06 Jun 2002

J. Anal. At. Spectrom., 2002,17, 1096-1102
Article type
Paper

Spectral and non-spectral interferences in the determination of selenium by inductively coupled plasma atomic emission spectrometry

J. Machat, V. Otruba and V. Kanicky, J. Anal. At. Spectrom., 2002, 17, 1096
DOI: 10.1039/B202167F

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