Published:Journal of Chromatographic Science,
ISSN 0021-9665Volume 37, Number
11, November 1999, pp. 436-442
Determination
of Dialkyldiselenides in Water by Gas Chromatography–Mass Spectrometry
Using 1-Fluoro-2,4-dinitrobenzene as Derivatization Reagent
J.L.
Gómez-Ariza, J.A. Pozas, I. Giráldez, and E. MoralesThe
feasibility of gas chromatography–mass spectrometry for the speciation of
traces of dialkyldiselenides in the presence of dialkylselenides and inorganic
selenium species is described, and the procedure is applied to environmental samples.
The analysis is based on the reaction of dialkyldiselenide species with 1-fluoro-2,4-dinitrobenzene
after volatilization of selenium species as alkylselenols using a volatilization
and trap device. Parameters affecting the volatilization and derivatization of
the selenium compounds are discussed, and the performance of the method is described.
The approach reaches detection limits in the order of nanograms (after a preconcentration
step) and has been applied to the analysis of dimethyldiselenium and diethyldiselenium
in natural waters.
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