Chemical vapor generation - electrothermal atomic absorption spectrometry: new perspectives

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DOIResolve DOI: http://doi.org/10.1016/S0584-8547(02)00204-5
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TypeArticle
Journal titleSpectrochimica Acta Part B: Atomic Spectroscopy
ISSN05848547
Volume57
IssueDecember 2 12
Pages20472056; # of pages: 10
AbstractVolatile species of Ag, Cu, Cd, and Zn were generated at room temperature by the addition of sodium tetrahydroborate (III) to an acidified solution of the analytes. The vapor-phase species were rapidly transported to a pre-heated graphite tube, the surface of which was previously treated with Ir as a permanent chemical modifier. The volatile species were trapped at the Ir treated tube surface, and the further heating of the furnace permits their determination by atomic absorption spectrometry. A univariate approach was used to achieve optimized conditions and derive the figures of merit. The limits of detection based on a 3σb criterion were 10 (1); 0.006 (6×10−4); 28 (2.8) and 1.1 (0.11) ng (μg ml−1) for Ag, Cd, Cu and Zn, respectively. Precision of replicate measurements was typically approximately 10% R.S.D. Using a transfer line as short as possible should minimize losses of analyte during the transport to the graphite furnace. The overall efficiency of the volatile species generation and trapping process estimated for silver was 13%.
Publication date
LanguageEnglish
AffiliationNRC Institute for National Measurement Standards; National Research Council Canada
Peer reviewedNo
Identifier10274169
NRC number112
NPARC number8900457
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Record identifier6578db22-4d68-45da-833d-08111a38cc7a
Record created2009-04-22
Record modified2016-05-09
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