近年来,人们研究了一些在水相中测定微量钽的方法。虽然灵敏度较高,但在选择性方面,特别是对铌的干扰,尚未得到较好解决。因此寻找灵敏度高,选择性好,能测定微量钽的水相比色法,仍是一个有实用价值的课题。最近AHTOHOBl41i等报道了光度测定铌和氧化铌中钽的新方法。本文研究了用柠檬酸、过氧化氢、水杨基萤光酮和溴化十六烷基三甲基铵(CTMAB)—曲通X—100(TritonX— In recent years, people have studied some methods for the determination of trace tantalum in aqueous phase. Although the sensitivity is high, the selectivity, especially for niobium, has not been well resolved. Therefore, looking for high sensitivity, good selectivity, the determination of trace tantalum water colorimetric method is still a practical issue. Recently, AHTOHOBl41i et al reported a new method for photometric determination of tantalum in niobium and niobium oxide. In this paper, we studied the effects of citric acid, hydrogen peroxide, salicylfluorone and cetyltrimethylammonium bromide (CTMAB) - Triton X-