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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A New Method for Low-Temperature Decomposition of Chromites and Dichromium Trioxide using Bromic Acid Evaluated by Chromium Isotope Measurements Tvůrce(i) Chrastný, V. (CZ)
Rohovec, Jan (GLU-S) RID, SAI
Čadková, E. (CZ)
Pašava, J. (CZ)
Farkaš, J. (CZ)
Novák, M. (CZ)Zdroj.dok. Geostandards and Geoanalytical Research. - : Wiley - ISSN 1639-4488
Roč. 38, č. 1 (2014), s. 103-110Poč.str. 8 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova chromites ; dichromium trioxide ; decomposition ; chromium isotopes ; bromic acid Vědní obor RIV DD - Geochemie Institucionální podpora GLU-S - RVO:67985831 UT WOS 000331465800008 EID SCOPUS 84894275209 DOI 10.1111/j.1751-908X.2013.00229.x Anotace 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. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2015
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