On‐Line speciation of mercury and methylmercury in aqueous samples by chromatography‐atomic fluorescence spectrometry after hydride generation
作者:
Rob Ritsema,
Olivier F. X. Donard,
期刊:
Applied Organometallic Chemistry
(WILEY Available online 1994)
卷期:
Volume 8,
issue 7‐8
页码: 571-575
ISSN:0268-2605
年代: 1994
DOI:10.1002/aoc.590080705
出版商: John Wiley&Sons, Ltd.
关键词: Organometallic speciation;mercury;methylmercury;seawater;hydride generation;gas chromatography;atomic fluorescence spectrometry
数据来源: WILEY
摘要:
AbstractA method is described for the determination of picogram amounts of inorganic mercury(II) and methylmercury(II) compounds in seawater. These compounds are first volatilized from the water samples by reduction to mercury (Hg0) and formation of methylmercury hydride (CH3HgH) by means of a sodium borohydride (NaBH4) solution and cryogenically focused onto a chromatographic stationary phase. Both mercury compounds are eluted according their boiling points and are passed through a pyrolysis tube, at 900°C, before entering the atomic flurescence detector. Absolute detection limits (3σ) are 1 and 2 pg for, respectively, inorganic mercury and methylmercury. For seawater analysis, detection limits of 0.1–1.0 ng I−1can be ach
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