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DETERMINATION OF TRACE COBALT(II) BY CATALYTIC SPECTROPHOTOMETRY

Liu Li

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Abstract

Objective:To study a new system of determining trace cobalt(Ⅱ).Methods:Catalytic spectrophotometry.Results:Cobalt(Ⅱ) in NaOH can catalyze the discolouring oxidation of 3,5-dibromosalicylfluorone(DBSF) by H 2O 2,a new method for determining trace cobalt(Ⅱ) was established.The detection limit of the method is 8.7×10 -13 ?g/ml and the range of determination is 0～4?ng/10?ml.Conclusion:The method has high sensitivity and selectivity.Satisfactory results were obtained for the determination of trace cobalt(Ⅱ) in VB 12 .

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What this paper is about

Objective:To study a new system of determining trace cobalt(Ⅱ).Methods:Catalytic spectrophotometry.Results:Cobalt(Ⅱ) in NaOH can catalyze the discolouring oxidation of 3,5-dibromosalicylfluorone(DBSF) by H 2O 2,a new method for determining trace cobalt(Ⅱ) was established.The detection limit of the method is 8.7×10 -13 ?g/ml and the range of determination is 0～4?ng/10?ml.Conclusion:The method has high sensitivity and selectivity.Satisfactory results were obtained for the determination of trace cobalt(Ⅱ) in VB 12 .

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Available abstract

Objective:To study a new system of determining trace cobalt(Ⅱ).Methods:Catalytic spectrophotometry.Results:Cobalt(Ⅱ) in NaOH can catalyze the discolouring oxidation of 3,5-dibromosalicylfluorone(DBSF) by H 2O 2,a new method for determining trace cobalt(Ⅱ) was established.The detection limit of the method is 8.7×10 -13 ?g/ml and the range of determination is 0～4?ng/10?ml.Conclusion:The method has high sensitivity and selectivity.Satisfactory results were obtained for the determination of trace cobalt(Ⅱ) in VB 12 .

Key concepts: Cobalt, Spectrophotometry, Detection limit, TRACE (psycholinguistics), Chemistry, Catalysis, Selectivity, Linear range

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