本文探讨了用碘化钾罗丹明B光度法测定水质中微量铋,并叙述了所用试剂和分析步骤。同时介绍了显色酸度、络合物的最大吸收波长,显色液稳定性及回收率等条件试验情况。实践证明,此法简便、快速、灵敏度高、准确度也较好。 This article discusses the determination of trace amounts of bismuth in water by potassium iodide rhodamine B spectrophotometry and describes the reagents and analytical procedures used. At the same time, the condition of the chromogenic acidity, the maximum absorption wavelength of the complex, the stability of the chromogenic liquid and the recovery rate were introduced. Practice has proved that this method is simple, fast, high sensitivity, accuracy is better.