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PHOTOMETRIC DETERMINATION OF MICROAMOUNTS OF CERIUM IN ZINC ALLOY WITH THE NEW CHROMOGENIC REAGENT DIBROMOCARBOXY FLUOROARSENAZO

Jun Zong

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Abstract

In an acidic solution of 0.14 mol·L~(-1) hydrochloric acid, the new chromogenic reagent dibromocarboxy fluoroarsenazo (abbreviated as FAsA-DBK) reacts with cerium(Ⅳ) to form a bluish violet coordination complex with its Absorption maximum at 632 nm. The apparent molar Absorptivity of this coordination complex was found to be 1.2×10~5L·mol~(-1)·cm~(-1). Beer′s law holds in the range of 0~28 μg of Ce(Ⅳ) per (25 mL) of solution. Based on the results of interference testing, the color reaction was applied to the determination of cerium in zinc alloys successfully.

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What this paper is about

In an acidic solution of 0.14 mol·L~(-1) hydrochloric acid, the new chromogenic reagent dibromocarboxy fluoroarsenazo (abbreviated as FAsA-DBK) reacts with cerium(Ⅳ) to form a bluish violet coordination complex with its Absorption maximum at 632 nm. The apparent molar Absorptivity of this coordination complex was found to be 1.2×10~5L·mol~(-1)·cm~(-1). Beer′s law holds in the range of 0~28 μg of Ce(Ⅳ) per (25 mL) of solution. Based on the results of interference testing, the color reaction was applied to the determination of cerium in zinc alloys successfully.

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Available abstract

In an acidic solution of 0.14 mol·L~(-1) hydrochloric acid, the new chromogenic reagent dibromocarboxy fluoroarsenazo (abbreviated as FAsA-DBK) reacts with cerium(Ⅳ) to form a bluish violet coordination complex with its Absorption maximum at 632 nm. The apparent molar Absorptivity of this coordination complex was found to be 1.2×10~5L·mol~(-1)·cm~(-1). Beer′s law holds in the range of 0~28 μg of Ce(Ⅳ) per (25 mL) of solution. Based on the results of interference testing, the color reaction was applied to the determination of cerium in zinc alloys successfully.

Key concepts: Chromogenic, Molar absorptivity, Cerium, Reagent, Zinc, Hydrochloric acid, Color reaction, Chemistry

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PHOTOMETRIC DETERMINATION OF MICROAMOUNTS OF CERIUM IN ZINC ALLOY WITH THE NEW CHROMOGENIC REAGENT DIBROMOCARBOXY FLUOROARSENAZO — Research Paper | ScholarLens