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Determination of Trace Cobalt by Catalytic Spectrophotometry

Liping Liu

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Abstract

Cobalt(Ⅱ) in NaOH can catalyze the discolouring oxidization of 2,4 dichlorophenylfluorone(DClPF)by H 2O 2.A new catalytic spectrophotometric method for determining trace cobalt(Ⅱ) was obtained.The detection limit of the method is 2.0×10 -12 g/mL and the range of determination is 0～5 ng/10mL.This method has high sensitivity and selectivity.It does not need heating and has less interference.It has been used to determine trace cobalt(Ⅱ) in vitamin B 12 with satisfactory results.

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What this paper is about

Cobalt(Ⅱ) in NaOH can catalyze the discolouring oxidization of 2,4 dichlorophenylfluorone(DClPF)by H 2O 2.A new catalytic spectrophotometric method for determining trace cobalt(Ⅱ) was obtained.The detection limit of the method is 2.0×10 -12 g/mL and the range of determination is 0～5 ng/10mL.This method has high sensitivity and selectivity.It does not need heating and has less interference.It has been used to determine trace cobalt(Ⅱ) in vitamin B 12 with satisfactory results.

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Available abstract

Cobalt(Ⅱ) in NaOH can catalyze the discolouring oxidization of 2,4 dichlorophenylfluorone(DClPF)by H 2O 2.A new catalytic spectrophotometric method for determining trace cobalt(Ⅱ) was obtained.The detection limit of the method is 2.0×10 -12 g/mL and the range of determination is 0～5 ng/10mL.This method has high sensitivity and selectivity.It does not need heating and has less interference.It has been used to determine trace cobalt(Ⅱ) in vitamin B 12 with satisfactory results.

Key concepts: Cobalt, Spectrophotometry, Detection limit, TRACE (psycholinguistics), Chemistry, Catalysis, Selectivity, Interference (communication)

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