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- W2023872884 abstract "To monitor the oxidation of arsenite to arsenate in oxidizing and bioleaching reactors, speciation analysis of the inorganic arsenic compounds is required. Existing arsenic speciation analysis techniques are based on the use of liquid chromatography columns coupled to detector equipment such as inductively coupled plasma optical emission spectrometry (ICP-OES). These techniques are fairly complex and expensive. Therefore, for analysis of arsenic speciation in our studies on thermophilic iron and arsenic oxidation, we developed a simple (and inexpensive) method based on anionic ion exclusion chromatography using sulfuric acid as mobile phase, followed by UV detection. The detection limit was 0.1 mg L−1 of arsenite (As3+) and 0.1 mg L−1 of arsenate (As5+). The method was validated with samples from an iron-oxidizing bioreactor containing 0.12 mol L−1 H2SO4, 1 g L−1 arsenic, and 3 g L−1 iron. Samples from arsenopyritic gold concentrates by partial bio-oxidation and leaching samples were analyzed, showing the..." @default.
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- W2023872884 date "2010-12-14" @default.
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- W2023872884 title "HPLC inorganic arsenic speciation analysis of samples containing high sulfuric acid and iron levels" @default.
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- W2023872884 doi "https://doi.org/10.1080/02772248.2010.540245" @default.
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