✦ LIBER ✦

Catalytic method for the determination of trace amounts of manganese employing catalytic oxidation of fuchsin with oscillopolarographic detection

✍ Scribed by Zhi-Liang Jiang

Publisher: Elsevier Science
Year: 1992
Tongue: English
Weight: 390 KB
Volume: 260
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(92)80124-p

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✦ Synopsis

A sensitive and selective catalytic method for the determination of manganese at levels as low as 0.2 ng ml-' is described, based on the Mn(IIl-catalysed redox reaction between fuchsin and KIO, in the presence of nitrilotriacetic acid as activator and in acetate buffer solution (pH 4.11, KCNS was used to quench the reaction, and single-sweep oscillopolarograpy was employed to measure fuchsin, which exhibits a sensitive wave at -0.78 V vs. SCE. Manganese in aluminium alloy and waste water samples was determined by the method, the results are in agreement with those of a spectrophotometric method using formaldoxime. The polarographic character of fuchsin and the catalytic reaction mechanism are discussed.

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