Citation:
Cui Lijun, Li Huizhi, Xu Guangtong, Shen Xiaofeng. Catalytic-Kinetic Spectrophotometric Determination of Trace Iron(Ⅲ) after Separation and Concentration by Mercapto-Containing Dextran Gel[J]. Chinese Journal of Applied Chemistry,
;1996, 13(1): 104-106.
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Trace Fe(Ⅲ) catalyzes the discoloring oxidation reaction of arsenazo Ⅲ by potassium periodate(KIO4) in sulfuric acid medium.The kinetic conditions have been studied in detail.A new method of kinetic spectrophotometry for the determination of trace Fe(Ⅲ) is established.The sensitivity of method is 8 ng/L.The range of measurement is 0~0.06mg/L Fe(Ⅲ).The coexisting metal ions can be separated by mercapto-containing dextran gel.This method has been applied to the determination of trace iron(Ⅲ) in water and human hair samples with satisfactory results.
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