摘要
在ｐＨ９０～９５的硼砂－ＮａＯＨ缓冲介质中，钴与双硫腙形成１∶２的紫红色配合物，其最大吸收波长为５７０ｎｍ，在非离子表面活性剂ＯＰ存在下，可直接在水相中实现钴的测定。方法的灵敏度为４２９×１０４Ｌ·ｍｏｌ－１·ｃｍ－１，钴（Ⅱ）含量在０～１５μｇ／２５ｍＬ符合比尔定律。
It is found that cobalt reats with dithizone in Na 2B 4O 7-NaOH medmium to form a red-violet complex with a maximum absorption at 570nm. apparent molar absorptivity is 4.29×10 4L·mol -1 ·cm -1 , molar ratio of cobult to dithizone is 1∶2 and Beer′s Law is obeyed in the range of 0～25μgCo/25mL. The method may be applied to the determination of cobolt in VB 12 .
出处
《桂林工学院学报》
1998年第4期383-385,共3页
Journal of Guilin University of Technology
