Qi Yan-juan, Wang Xiao-ju, Li Hong-mei, Gao Hong-wei
Department of Chemistry, Changchun Normal College, Changchun 130032, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2002 Jun;22(3):449-50.
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.
建立了一种动力学分光光度法测定痕量钴（II）。该方法基于在HBO3-Na2B4O7溶液（pH = 8.5）存在下，钴（II）催化高碘酸钾使孔雀石绿褪色的反应。该方法的灵敏度为2.1×10（-10）g·mL-1。测定范围为0 - 0.8微克·25 mL-1。催化反应的表观活化能为37.94 kJ·mol-1。该方法已应用于茶叶和维生素B12注射液样品中钴的测定，结果令人满意。
