Evaluation of a sequential extraction method for determining actinide fractionation in soils and sediments

作者: Michael K Schultz , William C Burnett , Kenneth G.W Inn

DOI: 10.1016/S0265-931X(97)00075-1

关键词: Organic matterReagentUraniumRadiochemistryActinideExtraction (chemistry)FractionationNuclear chemistryFraction (chemistry)AmericiumChemistry

摘要: Abstract A sequential chemical extraction method for the determination of geochemical fractionation Am, Pu, and U was evaluated rigorously on a single marine sediment standard ( IAEA -135). Partitioning actinides operationally defined five reagent fractions stable element analyses (Al, Ca, Fe, Mn, Ti, etc.) were performed to assist in establishing phase specificity extractions. The produces, general, results that agree within one deviation interval replicate measurements each fraction. Actinide readsorption, examined by double-spiking technique, found be significant some cases. Ethylenediamine-tetraacetic acid (EDTA) as hold-back lessen effect readsorption but seriously compromised selectivity extractants. In addition, use NaOCl destruction organic matter dissolve carbonates out sequence is not recommended carbonate-bearing materials.

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