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A New Method for Low-Temperature Decomposition of Chromites and Dichromium Trioxide using Bromic Acid Evaluated by Chromium Isotope Measurements
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SYSNO ASEP 0427709 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title A New Method for Low-Temperature Decomposition of Chromites and Dichromium Trioxide using Bromic Acid Evaluated by Chromium Isotope Measurements Author(s) Chrastný, V. (CZ)
Rohovec, Jan (GLU-S) RID, SAI
Čadková, E. (CZ)
Pašava, J. (CZ)
Farkaš, J. (CZ)
Novák, M. (CZ)Source Title Geostandards and Geoanalytical Research. - : Wiley - ISSN 1639-4488
Roč. 38, č. 1 (2014), s. 103-110Number of pages 8 s. Publication form Print - P Language eng - English Country FR - France Keywords chromites ; dichromium trioxide ; decomposition ; chromium isotopes ; bromic acid Subject RIV DD - Geochemistry Institutional support GLU-S - RVO:67985831 UT WOS 000331465800008 EID SCOPUS 84894275209 DOI 10.1111/j.1751-908X.2013.00229.x Annotation In recent years, routine application of the stable isotope determination of chromium (Cr) in environmental and health protection research has led to the search for simpler chromite decomposition techniques. As the range of Cr isotope abundance ratios in nature is very narrow, conventional chromite decomposition techniques are no longer suitable, due to the relatively high risk of contamination during laboratory procedures. We have developed a protocol for the decomposition of chromites based on oxidation by bromic acid at room temperature. The procedure takes 15 d and requires two doses of bromic acid during the reaction period (day 1 and 8), due to the limited stability of the reagent. Chromium extracted by alkaline oxidative fusion and by bromic acid decomposition yielded statistically indistinguishable δ53Cr values, measured by multi-collector inductively coupled plasma-mass spectrometry following addition of a 50Cr-54Cr double-spike. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2015
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