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Optimization of extraction procedure for determination of total water-soluble chromium and chromium(VI) in various soils
Kožuh Eržen, Nevenka ...
The parameters influencing the extraction efficiency of total water-soluble chromium and chromium(VI) in clay, peat and sandy soils were investigated. Water and a K▫$H_2PO_4▫$ solution (0.0015 mol ...d▫$m^{-3}▫$) were used as extractants. Samples were ultrasonicated or shaken in classical shakers. Variations of solution volume-to-soil weight ratio, and of shaking time were studied in order to develop the optimal extraction procedure for the determination of total water-soluble chromium and chromium(VI). Soil samples treated with tannery waste continuously for 17 years and soils freshly contaminated with the same waste were studied.
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