1. Analyst, 1985, 110, 197 - 199
Sequential spectrophotometric determination of chromium(III) and chromium(VI) using flow injection analysis
João Carlos de Andrade, Julio Cesar Rocha and Nivaldo Baccan
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http://www.rsc.org/Publishing/Journals/AN/article.asp?doi=AN9851000197
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http://www.rsc.org/ejarchive/AN/1985/AN9851000197.pdf