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Catalytic Spectrophotometric for the Determination of Trace Cobalt by the New

Xiao Wang

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Abstract

A kinetic spectrophotometric method for determination of trace cobalt(Ⅱ) was setablished. it was based on the Co(Ⅱ) catalyzed the discoloring reaction of malachite green by potassium periodate in the presence of HBO 3-Ba 2B 4O 7 solution (PH=8.5). The sensitivity of method is 2.1×10 -10 g/mL. The rang of determination is 0~0.032μg/mL The apparent activation of catalytic reaction is 37.94kJ.mol -1 . The method has been applied to the determination of cobalt in tea leaf and injection of vitamin B 12 samples with satisfactory results.

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What this paper is about

A kinetic spectrophotometric method for determination of trace cobalt(Ⅱ) was setablished. it was based on the Co(Ⅱ) catalyzed the discoloring reaction of malachite green by potassium periodate in the presence of HBO 3-Ba 2B 4O 7 solution (PH=8.5). The sensitivity of method is 2.1×10 -10 g/mL. The rang of determination is 0~0.032μg/mL The apparent activation of catalytic reaction is 37.94kJ.mol -1 . The method has been applied to the determination of cobalt in tea leaf and injection of vitamin B 12 samples with satisfactory results.

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Available abstract

A kinetic spectrophotometric method for determination of trace cobalt(Ⅱ) was setablished. it was based on the Co(Ⅱ) catalyzed the discoloring reaction of malachite green by potassium periodate in the presence of HBO 3-Ba 2B 4O 7 solution (PH=8.5). The sensitivity of method is 2.1×10 -10 g/mL. The rang of determination is 0~0.032μg/mL The apparent activation of catalytic reaction is 37.94kJ.mol -1 . The method has been applied to the determination of cobalt in tea leaf and injection of vitamin B 12 samples with satisfactory results.

Key concepts: Cobalt, Potassium periodate, Catalysis, Malachite green, Chemistry, Spectrophotometry, Potassium bromate, Nuclear chemistry

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