Precision spectrophotometric determination of total iron in chromite ores

Autor:	M. E. M. Abdel Aziz, D. Thorburn Burns
Rok vydání:	1980
Předmět:	Residue (complex analysis) Zirconium Metallurgy Sodium peroxide chemistry.chemical_element Hydrochloric acid Biochemistry Analytical Chemistry Absorbance chemistry.chemical_compound Chromium chemistry Electrochemistry Environmental Chemistry Chromite Spectroscopy Nuclear chemistry
Zdroj:	The Analyst. 105:333
ISSN:	1364-5528 0003-2654
DOI:	10.1039/an9800500333
Popis:	Chemical and manipulative variables have been examined in detail in order to develop a precise and direct spectrophotometric determination of total iron in chromite ores. Samples are sintered with sodium peroxide in zirconium crucibles (3 h at 510 ± 10 °C), then leached and filtered. The filtrate can be used for the determination of chromium. The residue is dissolved in hydrochloric acid (1 + 1) and iron is determined from the absorbance of the iron(III)-chloro complex at 342 nm. The procedure has been evaluated using standard chrome-iron samples and a series of Sudanese chromite ores. The results are in good agreement and of comparable precision with other data.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d7a772dc2e9161b91a96a6280db10737 https://doi.org/10.1039/an9800500333 Zobrazit plný text záznamu