介绍了一种镀锌钝化液Cr~(3+)、CrO_3和Zn~(2+)连续自动分析装置.该装置采用流动注射分析区域采样流路系统.为了减小装置的体积,研制了三种光电检测系统.采用PC/XT微机控制整个分析过程及数据处理.对装置的性能,包括精密度、回收率、分析速度等进行了检测.实际钝化液分析结果显示本法与化学法相比相对误差一般不超过10%. A Cr (3 +), CrO_3 and Zn ~ (2 +) continuous automatic analyzer for galvanization passivation liquid is introduced in this paper, which uses the flow injection analysis system of zone sample flow path.In order to reduce the volume of the device, Three kinds of photoelectric detection system.Using PC / XT microcomputer to control the whole analysis process and data processing.The performance of the device, including precision, recovery rate and analysis speed were tested.The actual passivation solution analysis showed that this method and the chemical method Than the relative error of not more than 10%.