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- Author or Editor: A. Tsumura x
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Abstract
An analytical method has been developed for the determination of low-level99Tc in environmental samples by High Resolution ICP-MS. The method consists of leaching of99Tc by HNO3 and separation by three different solvent extractions with 30% TOA-xylene, MEK, and cyclohexanone. Finally, purification of99Tc was made by using an anion exchange resin column to reduce dissolved solids content. The final solution was adjusted to 1M HNO3 for introducing into the HR-ICP-MS. The accuracy and precision of the method was confirmed to be satisfactory by applying this technique to the determination of99Tc in IAEA marine algae sample (AG-B-1). Measurements of99Tc using 0.5–2.5 g of sediment samples from the Irish Sea, UK, were successfully performed by the present method.
Abstract
Approximately 100 freshwater samples (ground water, surface water, etc.) collected in the former USSR were analyzed by inductively coupled plasma mass spectrometry (ICP-MS). Standard water, NBS SRM 1643b, was used for quality control. By using the semi-quantitative analysis mode, analytical data and certified values (or informative values) were in agreement within ±30%. Concentrations of B, Ni, Se, Sr and Ba were found to be higher than global means. Concentration levels of Ag and Pb tended to be lower. For Be, V, Cr, Mn, Co, Cu, Zn, As, Mo, Cd, Tl, and Bi, the concentrations were almost equal to the global levels.
