Speciation of lead and methyllead ions in water by chromatography/atomic absorption spectrometry after ethylation with sodium tetraethylborate

This paper describes a novel method for speclation and determination of Me3Pb+ and Me2Pb2+. The procedure includes In situ ethylation by sodium tetraethylborate (NaBEt4) in water, purging and trapping of alkyllead molecules, and thermal desorption in an electrically heated quartz AAS furnace. The ab...

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Bibliographic Details
Published in:Analytical chemistry (Washington) 1986-01, Vol.58 (1), p.35-38
Main Authors: Rapsomanikis, Spyridon, Donard, O. F. X, Weber, James H
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemical Sciences
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Summary:This paper describes a novel method for speclation and determination of Me3Pb+ and Me2Pb2+. The procedure includes In situ ethylation by sodium tetraethylborate (NaBEt4) in water, purging and trapping of alkyllead molecules, and thermal desorption in an electrically heated quartz AAS furnace. The absolute detection limits of Pb for 50 cm3 are ca. 8.7 pg for Me3Pb+ (0.18 pg/cm3) and ca. 10.5 pg for Me2Pb2+(0.21 pg/cm3). Major advantages for the technique are avoidance of solvent extraction and sample transfers because ethylation to Me3E1Pb and Me2Et2Pb takes place in a closed system. Reaction conditions and apparatus operating parameters were optimized by a Simplex algorithm. © 1986, American Chemical Society. All rights reserved.
ISSN:0003-2700
1520-6882
DOI:10.1021/ac00292a011