Abstract
A new kinetic fluorimetric method has been proposed for the determination of trace manganese. The method is based on the catalytic oxidation of rhodamine 6G with potassium periodate in the presence of nitrilo triacetic acid as activator, in near neutral media. The detection limit for manganese is 0.018 ng/ml. The linear range of the determination is 0.04–1.00 ng/ml. The proposed method suffers from few interferences in the presence of more than 30 foreign ions. The method has been used to determine trace manganese in hair, urine, fish and water samples. The results are satisfactory.
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