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Updated: Nov 27, 2025

Quantification of Metal Leaching in Immobilized Metal Affinity Chromatography
Published on: January 17, 2020
Fast and easily obtained information about mobilizable metals from sediment samples. Extraction assisted by
María A Schiel1, Claudia E Domini1, Gustavo F Silbestri1
1Instituto de Química Del Sur (INQUISUR), Departamento de Química, Universidad Nacional Del Sur (UNS)-CONICET, Av. Alem 1253, B8000CPB Bahía Blanca, Argentina.
Abstract:
A fast and easy method for trace metal extraction on sediments was developed in our laboratories. Three new stable S-metylbenzothiophenium salts were employed along with microwaves to modify the BCR protocol to obtain the concentration of metals of the first two fractions in only one step. The optimum conditions were obtained with 0.125 g of sediment irradiated at 250 W for 30 s at 120 °C, in 5 ml of an aqueous mixture of 10 mM of 1,2-dimethylbenzothiophenium tetrafluoroborate and 0.5 M of hydroxylamine chlorhydrate at pH 2. The method validation was carried out employing BCR 701. The extracted metals were determined by ICP OES. A student's paired t-test was applied with the reference method, giving satisfactory results.
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