Optimization and assessment of a sequential extraction procedure for calcium carbonate rocks.

ABSTRACT: Sequential extraction analyses are widely used for the determination of element speciation in sediments and soils. Typical sequential extraction protocols were developed to extract from low-carbonate samples and therefore are not necessarily suitable for high-carbonate samples. In this study, we tested increased reagent to sample ratios to adjust an existing sequential extraction procedure to analyze high-CaCO₃ samples with concentrations ranging from 70 to above 90 %. Complete dissolution of the CaCO₃ phase, and a higher extraction efficiency of manganese associated with the carbonate phase, was achieved when using four times the original reagent to sample ratio in the 2nd extraction step. This increase of reagent did not compromise the extraction of subsequent phase

SUBMITTER: Scheplitz J 

PROVIDER: S-EPMC8364905 | biostudies-literature | 2021 Aug

REPOSITORIES: biostudies-literature