2006•Guangxi kexueRequires access

Spectrophotometric Determination of Cerium in Rare Earth by Chlorophosphonazo-mA

Huilin Tao

Abstract

Based on the decoloring reaction of CPA-mA with cerium(Ⅳ) in H_2SO_4 medium,a new method for the determination of micro amount cerium is developed.The maximum absorption is at 545 nm.Beer's law is obeyed in a concentration rang of 0 to 3.2mg/L of cerium.Its molar absorptivity is1.30×10~4L·mol~(-1)·cm~(-1).The method has been applied to the determination of cerium in rare earth oxides with satisfactory results.

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Key concepts: Cerium, Molar absorptivity, Chemistry, Rare earth, Absorption (acoustics), Nuclear chemistry, Inorganic chemistry, Materials science