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A study on the generation of hydrogen selenine and decomposition of tetrahydroborate in hydride-generation atomic absorption spectrometry

✍ Scribed by J. Agterdenbos; D. Bax

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 633 KB
Volume: 188
Category: Article
ISSN: 0003-2670
DOI: 10.1016/s0003-2670(00)86037-7

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✦ Synopsis

Literature data on the decomposition of sodium tetrahydroborate

predict that the reagent is decomposed within 1 ms of being mixed with an acidic sample. This is confirmed experimentally. Hydrogen selenide and other hydrides must therefore be formed even more quickly. The reaction coil often used in continuous flow systems is not necessary for completion of the reaction, but in its absence low results are obtained because the coil contributes to the separation of the hydride from the liquid phase. A study of the effects of Co*+, Nil' and Cu'+ indicates that their interference arises at least partly from enhanced decomposrtion of tetrahydroborate, thus allowing less hydride formation.

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