研究了在含水量 90 %的非离子型微乳液——乳化剂 op/正丁醇 /正庚烷 /水中 ,在室温下用 5- Br- PADAP与 Co( )的显色反应进行 ,分光光度法测定钴 ,配合物最大吸收波长在 588nm,摩尔吸光系数达 1 .1 3*1 0 5 L· mol-1· cm-1 ,与相同含水量的乳化剂 OP胶束体系相比 ,本法测定的灵敏度明显提高 .Co含量 0～ 30μg/ 2 5ml范围符合比耳定律 The color reaction of 5-Br-PADAP with Co () was studied at room temperature with non-ionic microemulsion-emulsifier op / n-butanol / n-heptane / water with 90% Method for the determination of cobalt, the maximum absorption wavelength of the complex at 588nm, molar extinction coefficient of 1.13 * 105L · mol-1 · cm-1, compared with the same water content emulsifier OP micellar system, the method The sensitivity was significantly increased.Co content 0 ~ 30μg / 2 5ml range in line with Beer’s Law