Influence of sample preparation on the determination of the elemental composition of fresh water sponges by inductively coupled plasma mass spectrometry
| Autor: | E. N. Vodneva, N. N. Kulikova, A. N. Suturin, L. F. Paradina, N. N. Pakhomova, N. A. Semiturkina, E. V. Saibatalova |
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| Rok vydání: | 2010 |
| Předmět: | |
| Zdroj: | Journal of Analytical Chemistry. 65:674-681 |
| ISSN: | 1608-3199 1061-9348 |
| DOI: | 10.1134/s1061934810070038 |
| Popis: | To find the optimal way of the sample preparation of sponges for the determination of their elemental composition, three techniques of digestion were tested: acidic (mixtures of nitric, chloric, and hydrofluoric acids and hydrogen peroxide) upon heating in open vessels, autoclave-assisted at higher temperature and pressure, and decomposition in microwave ovens (MW). Using inductively coupled plasma mass spectrometry (ICP MS), we determined the concentrations of 23 elements in sponges Baikalospongia bacillifera Dubowski, 1880. The accuracy checks have demonstrated a good agreement between the measured and assured values. The attained limits of detection ranged from 32 mg/kg (for Al after autoclave digestion) to 0.1–0.2 µg/kg (for Tl, open acidic with HClO4 and MW decomposition). The relative standard deviation varied from rather modest values (for Cu, Cs, Ba, autoclave decomposition; Se, open acidic HClO4-free; Zn, open acidic with HClO4) to 30% (Be, Tl, Pb, autoclave decomposition; Be, Cr, Ga, Pb, open HClO4-free acidic digestion), 40% (Cs, MW), and 60% (Se, open acidic with HClO4). Different ways of digestion showed good compatibility of the results for the elements under study, except for Li, Sr, and Se. For Cr and Co (open acidic with HClO4), Cr, Ni, and As (MW), the method appeared insufficiently sensitive. |
| Databáze: | OpenAIRE |
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