Determination of bismuth in sea-water by electrothermal atomic absorption spectrometry after liquid–liquid extraction and micro-volume back-extraction
| Autor: | Yoshio Shijo, Satoshi Sakurai, Michiko Mitsuhashi, Tokuo Shimizu |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Detection limit
chemistry.chemical_classification Extraction (chemistry) Xylene Analytical chemistry chemistry.chemical_element Biochemistry Analytical Chemistry law.invention Bismuth chemistry.chemical_compound chemistry Liquid–liquid extraction law Nitric acid Electrochemistry Environmental Chemistry Dithiocarbamate Atomic absorption spectroscopy Spectroscopy |
| Zdroj: | The Analyst. 117:1929-1931 |
| ISSN: | 1364-5528 0003-2654 |
| DOI: | 10.1039/an9921701929 |
| Popis: | A method for the determination of bismuth at ng l–1 levels in sea-water is described. Bismuth is extracted into xylene as the dithiocarbamate complex and subsequently back-extracted into 100 µl of nitric acid for determination by electrothermal atomic absorption spectrometry (ETAAS). The high efficiency of extraction and back-extraction allows bismuth to be concentrated about 25000-fild with a combined single extraction and back-extraction. The back-extracted solution is suitable for the determination of bismuth by ETAAS. Detection limit for Bi is 0.27 mg l–1 based on a 3300-fold preconcentration. The concentration of bismuth in coastal sea-water was found to be 1.6 ng l–1 by the proposed method. The accuracy of the results was assessed by comparison with those obtained by other analytical techniques. |
| Databáze: | OpenAIRE |
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