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研究结果表明，在混合表面活性剂ＣＴＭＡＢ－吐温－６０存在下的ｐＨ５．７～６．５的缓冲介质中，Ｓｃ（Ⅲ）与４，５－二溴苯基荧光酮（ＤＢＰＦ）形成高灵敏的多元配合物，其ε＿（５９０）＝２．２６×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），组成比为：Ｓｃ：ＤＢＰＦ：ＣＴＭＡＢ＝１：２：４。采用混合表面活性剂使增溶增敏作用更为显著，并加速了显色反应，增强了配合物的稳定性。而Ｎａ＿２ＳＯ＿４的加入能显著地提高体系的灵敏度。Ｓｃ量在０～０．３６ｕｇ／ｍｌ范围内遵守比尔定律。方法可直接测定合成混合稀土中的Ｓｃ，回收率在９８％～１０５％；结合沉淀分离和ＰＭＢＰ萃取分离，实现了地质试样中痕量Ｓｃ的测定。
The results showed that Sc (Ⅲ) and DBPF formed high buffer media with pH5.7 ~ 6.5 in the presence of mixed surfactant CTMAB-Tween-60 The sensitive multivalent complex has ε 590 590 = 2.26 × 10 -5 L · mol -1 (-1) cm -1 and composition ratio Sc: DBPF: CTMAB = 1: 2: 4. The use of mixed surfactants makes solubilization and sensitization more significant, accelerates the color reaction and enhances the stability of the complex. The addition of Na_2SO_4 can significantly improve the sensitivity of the system. Beer’s law is obeyed in the range of 0 ~ 0.36ug / ml. The method can directly measure the content of Sc in synthetic rare earth, and the recovery rate is between 98% and 105%. The determination of trace Sc in geological samples is achieved by the combination of precipitation separation and PMBP extraction and separation.