钛-3,5-二溴水杨基荧光酮-表面活性剂显色体系的研究及应用

Study on the color reaction of titaniumⅣ with 3,5-dibromosalicylfluorone and tween-60 and its application

本文研究了钛 3 ,5 二溴水杨基荧光酮 (DBSF) 吐温 60三元络合物的显色反应条件及应用。结果表明 ,在 0 0 48～0 0 64mol/L盐酸介质中 ,形成了摩尔比为Ti ∶DBSF∶Tween 80 =1∶2∶4的三元络合物 ,最大吸收在 54 1nm波长处 ,表观摩尔吸光系数为 1 74× 1 0 5 ,钛含量在 0～ 1 1 μg/ 2 5mL遵守比尔定律 ,方法灵敏 ,选择性较高 ,操作简便 ,可不经分离直接测定钢铁样品中微量钛 ,结果满意。

A new colour reaction of Ti*$with 3,5-dibromosalicylfluoro ne(DBSF)and tween-60 has been stud ied.The complex of Ti*$with DBSF and tween-60 is formed in 0.048-0. 064mol/L HCl medium,the compositio n ratio of Ti*$∶DBSF∶Tween-60 is 1∶2∶4.The apparent molar absorptiv ity of the complex is 1.74×10 5L.mo l -1 .cm -1 at 541nm.Beer′s law is ob eyed for the concentration of tita nium*$in the range of 0-11μg/25mL .The proposed method is sensitive and selective, which has been appli ed to determine the trace amounts of titanium in alloy steels withou t separation with satisfactory res ults.