Catalytic Spectrophotometry for the Determination of Trace Cobalt by the New Indicating Reaction

被引：0

作者：

Qi, Yan-Juan ^{[1
]}

Wang, Xiao-Ju ^{[1
]}

Li, Hong-Mei ^{[1
]}

Gao, Hong-Wei ^{[1
]}

机构：

[1] Department of Chemistry, Changchun Normal College, Changchun 130032, China

来源：

Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | 2002年 / 22卷 / 03期

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摘要：

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 × 10-10 g*mL-1.The range of determination is 0-0.8 μg*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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页码：15 / 450