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在阳离子表面活性剂存在下,以邻硝基苯基萤光酮(o—NPF)作显色剂测定钢铁中的微量钛已有报道,但在非离子表面活性剂存在下,利用o—NPF胶束增溶光度法测定钛的研究还未见报道。试验表明,在非离子表面活性剂存在下,o—NPF与钛的反应同样具有很高的灵敏度,络合物的摩尔吸光系数可达1.29～2.08×10~5(见表1),在适当掩蔽剂存在下,方法可获得较好的选择性,适于钢铁及金属中微量、痕量钛的测定。
Determination of trace titanium in steel with o-nitrophenylfluorone (o-NPF) as a chromogenic agent has been reported in the presence of cationic surfactants but in the presence of nonionic surfactants, o-NPF Micellar solubilization spectrophotometric determination of titanium has not been reported. The experimental results show that the reaction of o-NPF with titanium also has high sensitivity in the presence of non-ionic surfactant. The molar extinction coefficient of the complex can reach 1.29 ~ 2.08 × 10 ~ 5 (see Table 1) In the presence of masking agent, the method can obtain better selectivity and is suitable for the determination of trace and trace titanium in steel and metals.