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Catalytic spectrophotometric determination of trace aluminumin marine bio-materials

Hui Zhong Xu

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Abstract

Trace aluminum (III) can catalyze the discolouring oxidization of methylene blue by hydrogen peroxide in HCl-KClbuffer with a pH (value) of 2.0. Based on this selective reaction, a new kinetictic spectrophotometric method for the determination of trace aluminum has been (developed). The detection limit of the method is 0.28 μg/L for aluminum and the linear detection range is 0～160 μg/L. The interfering effect of ferric and cupric ions could be effectively eliminated by methyl isobutyl ketone (MIBK) extraction after chlated with DDTC. The satisfactory results were obtained for the determination of selenium in several kinds of seagrass and bivalves with RSD less than 8% and recoveries between 95% and 107%.

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What this paper is about

Trace aluminum (III) can catalyze the discolouring oxidization of methylene blue by hydrogen peroxide in HCl-KClbuffer with a pH (value) of 2.0. Based on this selective reaction, a new kinetictic spectrophotometric method for the determination of trace aluminum has been (developed). The detection limit of the method is 0.28 μg/L for aluminum and the linear detection range is 0～160 μg/L. The interfering effect of ferric and cupric ions could be effectively eliminated by methyl isobutyl ketone (MIBK) extraction after chlated with DDTC. The satisfactory results were obtained for the determination of selenium in several kinds of seagrass and bivalves with RSD less than 8% and recoveries between 95% and 107%.

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Available abstract

Trace aluminum (III) can catalyze the discolouring oxidization of methylene blue by hydrogen peroxide in HCl-KClbuffer with a pH (value) of 2.0. Based on this selective reaction, a new kinetictic spectrophotometric method for the determination of trace aluminum has been (developed). The detection limit of the method is 0.28 μg/L for aluminum and the linear detection range is 0～160 μg/L. The interfering effect of ferric and cupric ions could be effectively eliminated by methyl isobutyl ketone (MIBK) extraction after chlated with DDTC. The satisfactory results were obtained for the determination of selenium in several kinds of seagrass and bivalves with RSD less than 8% and recoveries between 95% and 107%.

Key concepts: Methyl isobutyl ketone, Detection limit, Chemistry, Selenium, Hydrogen peroxide, Methylene blue, Linear range, Catalysis

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