光度法测定铌的试剂发展很快,一些灵敏度高、选择性好的试剂不断出现。本文的目的是针对纸上色层分离岩石矿物中铌及其伴生元素比较清楚的特点,通过对硫氰酸盐、PAR、氯代磺酚S、二甲酚橙、溴代连苯三酚红(BPR)、酸性铬蓝K、DSPCF等七种光度法测定铌的方法比较,选择操作简便、灵敏度高、选择性好的测定方法,以适应野外地质分析的需 Photometric determination of niobium reagents developed rapidly, some high sensitivity, good selectivity of the emerging reagents. The purpose of this paper is to study the color separation of rock minerals niobium and its associated elements more clearly the characteristics of thiosulfate, PAR, chlorosulfonates S, xylenol orange, brominated pyrogallol red (BPR), acid chrome blue K, DSPCF and other seven spectrophotometric methods for the determination of niobium, the selection of simple, high sensitivity and selectivity of the determination of methods to meet the needs of field geological analysis