Determination of bismuth and lead in geological samples by electrothermal AASPart 1. Comparative study of tungsten containing chemical modifiers

A comparative study on the efficiency of some tungsten containing chemical modifiers such as W, W+Pd, W+Rh, W+Pt and W+Ru for thermal stabilization of Bi, In, Pb and Sb has been performed systematically by a Zeeman electrothermal atomization atomic absorption spectrometer (ETAAS). The addition of ta...

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Bibliographic Details
Published inAnalytical and bioanalytical chemistry Vol. 357; no. 6; pp. 656 - 660
Main Authors Acar Orhan, Rehber, Türker A, Kılıç Ziya
Format Journal Article
LanguageEnglish
Published Berlin Springer Nature B.V 01.03.1997
Subjects
Acids
Antimony
Atomic absorption analysis
Atomizing
Bismuth
Comparative studies
Decomposition
Efficiency
Geology
Graphite
Lead
Palladium
Platinum
Pretreatment
Radiation
Reagents
Reducing agents
Spectral analysis
Tartaric acid
Temperature
Tungsten
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Summary:A comparative study on the efficiency of some tungsten containing chemical modifiers such as W, W+Pd, W+Rh, W+Pt and W+Ru for thermal stabilization of Bi, In, Pb and Sb has been performed systematically by a Zeeman electrothermal atomization atomic absorption spectrometer (ETAAS). The addition of tartaric acid (TA) as a reducing agent additionally to the mixed modifiers was studied. A mixture of W+Pd+TA was found to be a powerful mixed modifier for the determination of Bi, In, Pb and Sb. Pretreatment temperatures could be increased up to 1250–1500° C using this mixed modifier. The use of the mixed modifier results in an enhanced accuracy and precision of the method and recovery rates above 97% for all samples. The W+Pd+TA mixed modifier was applied to the determination of Bi and Pb in dissolved geological reference samples.
ISSN:1618-2642
1618-2650
DOI:10.1007/s002160050230