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2011•Rare Metals and Cemented CarbidesRequires access

Determination of the Cerium Content in Molybdenum Alloy by Direct Spectrophotometry with Tribromoarsenazo

Zhong Guo-xiu

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Abstract

The chromogenic reaction between tribromoarsenazo and cerium was studied.The results show that cerium reacts with tribromoarsenazo to form a blue complex in the mixture solution of 0.72 mol/L H2SO4 and 0.9 mol/L H3PO4.And the complex has an absorption maximum at 630 nm with an apparent molar absorptivity of 1.1 105 L/(mol·cm).Beer's law is obeyed when the cerium content in 25 mL solution is in the range of 0~30 μg.The proposed method can be applied in direct determination of cerium content in molybdenum alloy with RSD of 1.07%~2.20% and standard addition recovery of 97%~101%.

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The chromogenic reaction between tribromoarsenazo and cerium was studied.The results show that cerium reacts with tribromoarsenazo to form a blue complex in the mixture solution of 0.72 mol/L H2SO4 and 0.9 mol/L H3PO4.And the complex has an absorption maximum at 630 nm with an apparent molar absorptivity of 1.1 105 L/(mol·cm).Beer's law is obeyed when the cerium content in 25 mL solution is in the range of 0~30 μg.The proposed method can be applied in direct determination of cerium content in molybdenum alloy with RSD of 1.07%~2.20% and standard addition recovery of 97%~101%.

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Available abstract

The chromogenic reaction between tribromoarsenazo and cerium was studied.The results show that cerium reacts with tribromoarsenazo to form a blue complex in the mixture solution of 0.72 mol/L H2SO4 and 0.9 mol/L H3PO4.And the complex has an absorption maximum at 630 nm with an apparent molar absorptivity of 1.1 105 L/(mol·cm).Beer's law is obeyed when the cerium content in 25 mL solution is in the range of 0~30 μg.The proposed method can be applied in direct determination of cerium content in molybdenum alloy with RSD of 1.07%~2.20% and standard addition recovery of 97%~101%.

Key concepts: Cerium, Molar absorptivity, Molybdenum, Chromogenic, Spectrophotometry, Alloy, Chemistry, Nuclear chemistry

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Determination of the Cerium Content in Molybdenum Alloy by Direct Spectrophotometry with Tribromoarsenazo — Research Paper | ScholarLens