Abstract
A procedure for the extraction of Cr(VI) from solid soil-like samples was presented in which the complexing properties of diethylenetriaminepentaacetic acid (DTPA) were exploited to extract insoluble compounds of Cr(VI). A concentration of DTPA in an ammonium sulphate/ammonium hydroxide buffer equal to 0.02 mol l−1 was chosen. The conditions of extraction of insoluble Cr(VI) from solid samples were optimised using soil certified reference material spiked with known concentration of insoluble Cr(VI) added as PbCrO4. The extracts were analysed by adsorptive stripping voltammetry. Validation of the proposed procedure of extraction was carried out by analysis of certified reference material (CRM) 545 and comparison of the results obtained using the proposed and other methods of extraction in the course of analysis of natural soil samples.
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This work was supported by the Polish State Committee for Scientific Research (KBN grant, project 4 T09A 192 25).
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Grabarczyk, M., Korolczuk, M. & Tyszczuk, K. Extraction and determination of hexavalent chromium in soil samples. Anal Bioanal Chem 386, 357–362 (2006). https://doi.org/10.1007/s00216-006-0643-7
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DOI: https://doi.org/10.1007/s00216-006-0643-7