Kinetic spectrophotometric determination of trace manganese (II) with dahlia violet in nonionic microemulsion medium |
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| Authors: | Wei Qin Yan Liangguo Chang Guohua Ou Qingyu |
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| Institution: | a School of Chemistry and Environmental Engineering, Jinan University, Jinan 250022, People's Republic of China
b Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China |
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| Abstract: | A new catalytic kinetic spectrophotometric method has been developed for the determination of trace amount of manganese (II) in nonionic microemulsion medium. The method is based on the catalytic effect of manganese (II) on the oxidation of dahlia violet by potassium periodate with nitrilotriacetic acid as an activitor in the presence of nonionic microemulsion. Under the optimum conditions, the calibration graph is linear in the range of 0.0004-0.0056 μg ml−1 of manganese (II) at 580 nm. The detection limit achieved is 3.75×10−5 μg ml−1. Manganese (II) in foodstuff samples was determined with satisfactory results. |
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| Keywords: | Microemulsion medium Manganese (II) Catalytic kinetic method Dahlia violet |
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