| DOI | Resolve DOI: https://doi.org/10.1016/j.sab.2004.11.006 |
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| Author | Search for: Xu, S.; Search for: Sturgeon, R.1 |
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| Affiliation | - National Research Council of Canada. NRC Institute for National Measurement Standards
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| Format | Text, Article |
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| Subject | Chemical vapor generation; Atomic absorption spectrometry; Flow injection; Gold; Sodium tetraethylborate; Sodium tetrahydroborate |
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| Abstract | Sodium 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%. |
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| Publication date | 2005 |
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| In | |
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| Language | English |
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| NRC number | NRC-INMS-663 |
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| NPARC number | 8900281 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 95842207-f72e-4e5d-b9e6-7dc267e68145 |
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| Record created | 2009-04-22 |
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| Record modified | 2020-04-07 |
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