Abstract
Gas chromatographic separation was coupled with atomic fluorescence spectrometry (GC–AFS) directly via argon-hydrogen flame for integrated GC–AFS instrumentation, i.e., the outlet end of the GC column was directly put into the bottom of the Ar-H2 flame atomizer without any transportation interface. This laboratory-constructed GC–AFS instrument was preliminarily characterized by its application for the speciation analysis of dimethyl selenide ((Met)2Se) and dimethyl diselenide ((Met)2Se2) as well as the two-channel simultaneous determination of tetramethyl tin (Sn(Met)4) and tetraethyl lead (Pb(Et)4). Under the optimized experimental conditions, the absolute limits of detection of 9.4pg for (Met)2Se, 3.8pg for (Met)2Se2, 0.23ng for Sn(Met)4 and 0.39ng for Pb(Et)4 were obtained. The coupling is simple, and the whole instrument is compact.
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