Kinetic Spectrophotometric Determination of Trace Cerium(IV) on Discoloring of Arsenazo M Oxidized by Potassium Bromate

FOOD SCIENCE ›› 2005, Vol. 26 ›› Issue (3): 192-195.

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Kinetic Spectrophotometric Determination of Trace Cerium(IV) on Discoloring of Arsenazo M Oxidized by Potassium Bromate

ZHOU Zhi-Rong, ZHANG Li-Zhen, WANG Li

East China Institute of Technology

Online:2005-03-15 Published:2011-09-19

Abstract

Abstract: Based on the catalytic effect of trace tin on discoloring reaction of arsenazo M with potassium bromate in 0.08mol/L sulphuric acid solution, a method for the determination of trace cerium(IV) by kinetic spectrophotometry was studied. The detection limit was 0.5 μg/L and the linear range of determination is 0.0～20 μg/L for cerium(IV). Combined with polyurethane foam to absorb and separate cerium(IV), the method has been applied to the determination of trace cerium (IV) in human hair, tea and rice samples with satisfactory results.

Key words: cerium(IV), kineticspectrophotometry, arsenazo M, potassium bromate

ZHOU Zhi-Rong, ZHANG Li-Zhen, WANG Li. Kinetic Spectrophotometric Determination of Trace Cerium(IV) on Discoloring of Arsenazo M Oxidized by Potassium Bromate[J]. FOOD SCIENCE, 2005, 26(3): 192-195.

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Kinetic Spectrophotometric Determination of Trace Cerium(IV) on Discoloring of Arsenazo M Oxidized by Potassium Bromate

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