Itsuo Mori, Yoshikazu Fujita, Minako Toyoda and Yoko Takeuchi.
Highly sensitive spectrophotometric determination of osmium(VIII) with pyrogallolphthalein and hydrogen peroxide in the presence of Brij 35
Fresenius' Journal of Analytical Chemistry Volume 344, Num. 6, 1992 pp. 292-294.
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http://dx.doi.org/10.1007/BF00324993
