マンガンマグネシウムフェライト中のマンガンの迅速吸光光度定量

概要

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A rapid spectrophotometric method with manganese (III) -pyrophosphate was applied to the determination of manganese in manganese magnesium ferrite. The established procedure is as follows : - In 30ml of phosphoric acid is dissolved 0.5g of the ferrite sample, and the solution is diluted to 100ml with water. To a 20ml of sample solution is added 100ml of phosphoric acid to make the pH lower than 1. Manganese is oxidized with 8ml of 6% potassium bromate solution after adding 30ml of 0.5M potassium pyrophosphate solution, and the mixture is diluted to 100ml with water. The absorbance at 520mμ of the solution is measured spectrophotometrically against the reagent blank. The time required for an analysis was about 20 minutes.
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