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Comparison between (A) added (B) EXAFS-LCF determined concentrations of ferrihydrite, and the concentrations solubilized in hydroxylamine-HCl extractions, for unspiked and spiked Bangladesh sediments. (C) Comparison between Fe mineral compositions determined by extraction and by EXAFS-LCF. For extraction, fractions of extractable Fe were used. Fractions and uncertainties determined by EXAFS-LCF were re-calculated correspondingly.
