2009•Journal of Anhui Science and Technology UniversityRequires access

Color-Fading Spectrophotometric Determination of Cerium (IV) with Chlorophosphonazo-mA in Molecular Sieve

Chen Jun-hua

Abstract

In the medium of sulfuric acid,cerium(Ⅳ) works with Chlorophosphonazo-mA to produce color-fading reaction.The apparent molar absorptivity of the determination of cerium is e532nm=1.92×104 L·mol-1·cm-1.Beer's law is obeyed over the concentration range of 0.6～4.0 μg·mL-1 for cerium.The influence of twenty-one diverse ions on the determination of cerium(Ⅳ) was examined.The method has been satisfactorily applied to the determination of cerium in molecular sieves.

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Key concepts: Cerium, Molar absorptivity, Chemistry, Spectrophotometry, Sulfuric acid, Fading, Sieve (category theory), Color reaction