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Chemiluminescence of Colloidal MnO 2 with Luminol and Determination of Polyhydroxyl Compounds
Author(s) -
Li Yinhuan,
Yang Yun
Publication year - 2013
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201300015
Subject(s) - chemistry , luminol , chemiluminescence , ascorbic acid , pyrogallol , rutin , colloid , aqueous solution , manganese , nuclear chemistry , redox , inorganic chemistry , chromatography , organic chemistry , antioxidant , food science
The reaction between luminol and colloidal MnO 2 (prepared by chemical reduction of KMnO 4 with Na 2 S 2 O 3 under neutral aqueous condition) produced an intense chemiluminescence (CL) emission in alkaline medium. The CL reaction conditions were carefully optimized and the CL reaction mechanism was thoroughly discussed. Manganese(III) was suggested to be involved in the reaction and 3‐aminophthalate anion was the luminophor. Moreover, the effects of 23 compounds on the colloidal MnO 2 ‐luminol CL system were investigated to explore its possible analytical applications. Polyhydroxyl compounds were observed to inhibit the signal significantly, whereas sulfhydryl compounds enhance it slightly. The analytical figures for five polyhydroxyl compounds, namely ascorbic acid, rutin, pyrogallol, quercetin, and L‐adrenaline, were presented. As a preliminary application, the method was applied to the determination of rutin in pharmaceutical formulations.