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- W2079133942 abstract "A supramolecular catalytic kinetic spectrofluorimetric method was developed for the determination of osmium(IV) and the possible mechanism of catalytic reaction was discussed. The method is based on the fluorescence enhancing reaction of o-vanillin furfuralhydrazone (OVFH) with potassium bromate, which was catalysed by osmium(IV) in water medium. Beta-cyclodextrin (beta-CD) obviously sensibilized the determination at pH 6.10 and 55 °C. Under optimum conditions, beta-CD–osmium(IV)–KBrO3–OVFH supramolecular kinetic catalytic reaction system had excitation and emission maxima at 337 and 490 nm, respectively. The linear range of this method was 0–120 ng ml−1 with a R.S.D. of 1.1%, and the detection limit was 0.38 ng ml−1. The effect of interferences was studied. Distillation was used to separate osmium from interfering elements in the samples. The proposed method was applied successfully to determine osmium(IV) in synthetic mixture and mineral samples, the results were well consistent with the reference standard values." @default.
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- W2079133942 date "2004-07-01" @default.
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- W2079133942 title "Determination of trace osmium by supramolecular catalytic kinetic spectrofluorimetry of beta-CD–osmium-KBrO3-o-vanillin furfuralhydrazone" @default.
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- W2079133942 doi "https://doi.org/10.1016/j.talanta.2003.12.047" @default.
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