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Determination of bismuth in river sediment by electrothermal atomic absorption spectrometry with low-temperature atomization in argon/hydrogen

Authors
Journal
Analytica Chimica Acta
0003-2670
Publisher
Elsevier
Publication Date
Volume
186
Identifiers
DOI: 10.1016/s0003-2670(00)81783-3

Abstract

Abstract A method is described for the direct determination of bismuth (1–5 μg g −1) in river sediments by graphite-furnace atomic absorption spectrometry in 90% argon/10% hydrogen with low-temperature atomization. The presence of 10% hydrogen in the argon sheath gas promotes atomization; the bismuth absorption reaches a maximum at 850–950°C, which allows better discrimination of the atomic signal from the background absorption. The use of trisodium phosphate as the matrix modifier further decreases the interference effects from the matrix components and increases the sensitivity. The results, obtained by direct calibration with aqueous standards, are in good agreement with certified values.

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