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Updated: Apr 23, 2026

A Dual-Functional Electroactive Filter Towards Simultaneously SbIII Oxidation and Sequestration
Published on: December 5, 2019
Investigation on stability and preservation of antimonite in iron rich water samples
Birgit Daus1, Rainer Wennrich1
1UFZ- Helmholtz Centre for Environmental Research, Department Analytical Chemistry, Permoserstrasse 15, 04318 Leipzig, Germany.
Abstract:
The stability of antimonite in iron rich water samples is rather poor. The aim of the study was to find a simple procedure by using preservation agents to keep the speciation information from sampling till analysis. Species analysis of antimony traces (lower μg L(-1) range) was done by HPLC-ICP-MS. Phosphoric acid, tartrate, and EDTA were tested as preservation agents in comparison to no addition. The use of EDTA as the preservation agent provided the best results. The suggested procedure is to add 20 mM EDTA as final concentration immediately during sampling and store them at dark and cool (6 °C) as usual. Using this procedure, the stability of Sb(III) as well as of Sb(V) was proven for at least 7 days, even for high iron concentrations.
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