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Updated: Sep 20, 2026

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
Published on: December 6, 2021
[Catalytic spectrophotometry for the determination of trace cobalt by the new indicating reaction]
Yan-juan Qi1, Xiao-ju Wang, Hong-mei Li
1Department of Chemistry, Changchun Normal College, Changchun 130032, China.
Abstract:
A kinetic spectrophotometric method for the determination of trace cobalt(II) was established. It was based on the Co(II) catalyzing the discoloring reaction of malachite green by potassium periodate in the presence of HBO3-Na2B4O7 solution (pH = 8.5). The sensitivity of the method is 2.1 x 10(-10) g.mL-1. The range of determination is 0-0.8 microgram.25 mL-1. The apparent activation of catalytic reaction is 37.94 kJ.mol-1. The method has been applied to the determination of cobalt in tea leaf and injection of vitamin B12 samples with satisfactory results.
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