Flow injection chemical vapor generation of Au using a mixed reductant

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DOIResolve DOI: http://doi.org/10.1016/j.sab.2004.11.006
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Journal titleSpectrochimica Acta Part B: Atomic Spectroscopy
IssueJanuary 10 1
Pages101107; # of pages: 7
SubjectChemical vapor generation; Atomic absorption spectrometry; Flow injection; Gold; Sodium tetraethylborate; Sodium tetrahydroborate
AbstractSodium tetraethylborate was used to enhance the chemical vapor generation (CVG) efficiency of gold. Volatile species of Au in a weakly acidified buffer medium were generated at room temperature by reaction with a mixed reductant containing 0.1% NaBH4 and 0.01% NaBEt4 in the presence of 0.03% sodium diethyldithiocarbamate (DDTC). A flow injection (FI) system was coupled to a heated quartz tube atomizer for atomic absorption spectrometry (AAS) detection. A precision of 2.5% RSD (n=11, 0.4 mg/L level) was realized at sampling frequencies of 110/h. A detection limit of 2.8 ng/mL (3σ) was obtained based on a 500-μL sample volume. Compared with FI-CVG-AAS using NaBH4 as the sole reductant, sensitivity was increased 8- to 10-fold. In situ trapping of the analyte in a graphite furnace followed by electrothermal AAS detection, as well as signal monitoring using ICP-OES, was used to study the system. Generation efficiency is estimated to be in the range of 0.8–6%.
Publication date
AffiliationNRC Institute for National Measurement Standards; National Research Council Canada
Peer reviewedNo
NRC number663
NPARC number8900281
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Record identifier95842207-f72e-4e5d-b9e6-7dc267e68145
Record created2009-04-22
Record modified2016-05-09
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