A new kinetic spectrophotometric method for the determinations of iron(III) has been developed based on its catalytic effects on the oxidation reactions of azocarmine B by KIO4.Under the optimum conditions,the linea...A new kinetic spectrophotometric method for the determinations of iron(III) has been developed based on its catalytic effects on the oxidation reactions of azocarmine B by KIO4.Under the optimum conditions,the linear range for the determination of Fe3+ by the proposed method is 0～08μg/25ml,and the detection limit is 695×10-10g/ml.The relative standard deviation for 11 replicate determinations of 04 μg Fe(III) is 15%.The results obtained from the studies on the effects by more than 30 kinds of foreign ions indicated that the method free from most interference.The method has been applied for the determination of iron in water,human hair and food samples with relative standard deviations between 08% and 34%,and the recovery between 96% and 104%.展开更多
文摘A new kinetic spectrophotometric method for the determinations of iron(III) has been developed based on its catalytic effects on the oxidation reactions of azocarmine B by KIO4.Under the optimum conditions,the linear range for the determination of Fe3+ by the proposed method is 0～08μg/25ml,and the detection limit is 695×10-10g/ml.The relative standard deviation for 11 replicate determinations of 04 μg Fe(III) is 15%.The results obtained from the studies on the effects by more than 30 kinds of foreign ions indicated that the method free from most interference.The method has been applied for the determination of iron in water,human hair and food samples with relative standard deviations between 08% and 34%,and the recovery between 96% and 104%.
