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钴是人体健康必不可少的痕量元素之一.大量研究表明,钴对铁的代谢、血红蛋白的合成、红细胞的发育成熟等均有重要的生理功能.特别是钴作为维生素B_(12)的主要有效成分及其它钴化合物的组成部分,发挥着高效能的生血作用.因此,测定人体中微量元素钴有着重要的临床意义.催化动力学光度法测定痕量钴已有报道.但利用Fe(Ⅲ)—S_2O_3~2—1,10-二氮菲催化动力学体系测定痕量钴尚未见报道,它是基于Co(Ⅱ)催化Fe(Ⅲ)氧化S_2O_3~(2-)反应.该方法灵敏度高,检出限为4.87×10~(-10)g·ml~(-1),测定范围为0～0.72μg·ml~(-1),重现性好.用于测人发中痕量钴,结果满意.
Cobalt is one of the trace elements essential for human health.Many studies have shown that cobalt has important physiological functions on the metabolism of iron, the synthesis of hemoglobin and the development and maturation of red blood cells, especially cobalt as a vitamin B 12 The main active ingredients and other cobalt compounds play a part of the high-performance blood-generating role.Therefore, the determination of trace elements in human body has an important clinical significance.Determination of trace cobalt by catalytic kinetic spectrophotometry has been reported.But the use of Fe Ⅲ) -S_2O_3 ~ 2-1,10-phenanthroline Catalytic kinetic system for the determination of trace cobalt has not been reported and it is based on the catalytic oxidation of Fe (Ⅲ) with S_2O_3 ~ (2-) by Co (Ⅱ) The detection limit was 4.87 × 10 ~ (-10) g · ml ~ (-1), the determination range was 0 ~ 0.72μg · ml ~ (-1), and the reproducibility was good. Amount of cobalt, the result is satisfactory.