DOI | Trouver le DOI : https://doi.org/10.1016/j.sab.2004.11.006 |
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Auteur | Rechercher : Xu, S.; Rechercher : Sturgeon, R.1 |
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Affiliation | - Conseil national de recherches du Canada. Institut des étalons nationaux de mesure du CNRC
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Format | Texte, Article |
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Sujet | Chemical vapor generation; Atomic absorption spectrometry; Flow injection; Gold; Sodium tetraethylborate; Sodium tetrahydroborate |
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Résumé | 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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Date de publication | 2005 |
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Dans | |
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Langue | anglais |
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Numéro du CNRC | NRC-INMS-663 |
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Numéro NPARC | 8900281 |
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Exporter la notice | Exporter en format RIS |
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Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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Identificateur de l’enregistrement | 95842207-f72e-4e5d-b9e6-7dc267e68145 |
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Enregistrement créé | 2009-04-22 |
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Enregistrement modifié | 2020-04-07 |
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