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Determination of Cerium in Molecular Sieve with Tribromoarsenazo by Colour-fading Spectrophotometry

Qing-Zhou Zhai

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Abstract

In the medium of 0.18~1.08 mol· L~(-1) sulfuric acid, cerium(Ⅳ)reacts with tribromoarsenazo(TB-ASA) to produce color-fading reaction. The apparent molar absorptivity of the method is e_(532nm) = 6.20×10~3 L· mol~(-1)· cm~(-1).Cerium can be determined over the concentration range of 0.2～12μg·mL~(-1).The method was applied to the determination of microamount of cerium in molecular sieve with satisfactory results.

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What this paper is about

In the medium of 0.18~1.08 mol· L~(-1) sulfuric acid, cerium(Ⅳ)reacts with tribromoarsenazo(TB-ASA) to produce color-fading reaction. The apparent molar absorptivity of the method is e_(532nm) = 6.20×10~3 L· mol~(-1)· cm~(-1).Cerium can be determined over the concentration range of 0.2～12μg·mL~(-1).The method was applied to the determination of microamount of cerium in molecular sieve with satisfactory results.

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Available abstract

In the medium of 0.18~1.08 mol· L~(-1) sulfuric acid, cerium(Ⅳ)reacts with tribromoarsenazo(TB-ASA) to produce color-fading reaction. The apparent molar absorptivity of the method is e_(532nm) = 6.20×10~3 L· mol~(-1)· cm~(-1).Cerium can be determined over the concentration range of 0.2～12μg·mL~(-1).The method was applied to the determination of microamount of cerium in molecular sieve with satisfactory results.

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

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