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Issue 1, 2011
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Loss of di- and trimethylarsine on Nafion membrane dryers following hydride generation

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Abstract

Complete loss of trimethylarsine upon passage through a Nafion membrane dryer was identified. Pronounced loss of dimethylarsine—19 and 66%, depending on dryer dimensions—was also observed; arsine and methylarsine did not exhibit significant losses. Arsines were generated from corresponding precursors at the 2 ng ml−1 level by tetrahydroborate reduction, after passing through the dryer separated by cryotrapping and thermal desorption and detected by atomic absorption spectrometry with a quartz multiatomizer. Since Nafion membrane dryers have been commonly used in analytical atomic spectroscopy, implications for trace and speciation analysis of arsenic are discussed. A dryer based on sodium hydroxide pellets is proposed as an alternative, safe for all arsines.

Graphical abstract: Loss of di- and trimethylarsine on Nafion membrane dryers following hydride generation

  • This article is part of the themed collection: Speciation
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Article information


Submitted
25 Aug 2010
Accepted
09 Nov 2010
First published
18 Nov 2010

J. Anal. At. Spectrom., 2011,26, 220-223
Article type
Technical Note

Loss of di- and trimethylarsine on Nafion membrane dryers following hydride generation

P. Taurková, M. Svoboda, S. Musil and T. Matoušek, J. Anal. At. Spectrom., 2011, 26, 220
DOI: 10.1039/C0JA00136H

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