催化动力学光度法测定维生素B_（12）中钴的含量

Determination of Cobalt in Vitamin B_(12) with Catalytic-kinetic Photometric Method

通过钴（Ⅱ）催化Ｈ２Ｏ２氧化茜素红褪色反应体系的新催化光度法。本法灵敏度高，选择性好除Ａｇ＾＋，Ｍｎ＾２＋外其余共存离子基本无干扰，精密度高，用于药物维生素Ｂ１２中钴（Ⅱ）的含量测定，结果满意。

New catalytic-kinetic photometic method has been introduced with cobalt catalytic oxidation of alizarin red S by hydrogen peroxide.The method is found to have higher selectivity and precision.It has been used to determination of the content of cobalt in vitamin B12 with satisfactory results.