钴与5—磺酸[杯(4)芳烃偶氮]氨基喹啉显色反应的研究及应用

Study on Color Reaction Between Cobalt and SCAQ and Its Application

合成了新试剂 5—磺酸 [杯 ( 4)芳烃偶氮 ]氨基喹啉 ,并研究了该试剂与钴显色反应条件。结果表明 ,在pH >1 2的碱性介质中 ,在TritonX -1 0 0存在下 ,CAQ与钴发生显色反应 ,生成 1∶1稳定络合物。λmax=65 0nm ,ε=4 .80× 1 0 4L·mol- 1·cm- 1,钴含量在 0～ 1 2 0 0 μg/L内符合比耳定律。方法用于矿样中钴的测定 。

A new agent is synthensized and conditions of color reaction between the new agent and cobalt are studied.In the alkaline medium,CAQ and cobalt have color reaction with the existence of Trion X-100 and form 1∶1 stable complex compound.The molor absorptivity is 4.80×10 4 L·mol -1 ·cm -1 at 650 nm,Beer's law is obeyed in the cobalt range of 0～1 200 μg/L.The method can be applied to the determination of cobalt in the ore samples with satisfactory results.