Evaluation of methods based on acid extraction and atomic absorption spectrometry for multi-element determinations in rivers sidements
| Autor: | D. Goforth, G.S. Caravajal, D. E. Leyden, Kent I. Mahan |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
chemistry.chemical_classification
Extraction (chemistry) Analytical chemistry Fluorescence spectrometry chemistry.chemical_element Mineral acid Manganese Zinc Alkali metal Biochemistry Analytical Chemistry law.invention Matrix (chemical analysis) chemistry law Environmental Chemistry Atomic absorption spectroscopy Spectroscopy |
| Zdroj: | Analytica Chimica Acta. 147:133-150 |
| ISSN: | 0003-2670 |
| DOI: | 10.1016/0003-2670(83)80079-8 |
| Popis: | A method for the multi-element determination of major, minor and trace metals in sediments by mineral acid extraction (HNO3/HCl) and atomic absorption spectrometry (a.a.s.) is evaluated with the use of NBS SRM-1645 and applied in the analysis of river sediments. The elements Li, Na, K, Rb, Mg, Ca, Sr, Fe, Mn, Cu, Cd, V, Co, Cr, Ni, As, Sb, Tl, Pb, Zn, Al, Hg and Mo were determined by extraction—a.a.s. and compared to results obtained by lithium tetraborate fusion—energy-dispersive x-ray fluorescence spectrometry and electrothermal a.a.s. after digestion of the fused borosilicate glass. Good accuracy for Mn, Cu, V, Cr, Ni, As, Pb, Zn, Hg and Mo was obtained for both SRM-1645 and fluvial sediments. The low values found for Fe, Cd, Co, Sb and the alkali and alkaline earth metals were shown to be caused by incomplete extraction. All minor and trace elements, except manganese and zinc were determined by electrothermal a.a.s. and a detailed description of the problems encountered and of the matrix modification techniques applied is presented. This study demonstrates that electrothermal a.a.s. can be effective despite the presence of numerous matrix interferences but that this acid extraction procedure, although accurate and precise for most minor and trace elements determined, is inadequate for the dissolution of major elements in river sediments. |
| Databáze: | OpenAIRE |
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