2-羟基-3-甲氧基苯基荧光酮与钛显色反应的研究及应用  

Study on chromogenic reaction of 2-hydroxy-3-methoxyphenylfluorone with titanium and its application

作　　者：常世科[1] 汤家华[1] 李在均 潘教麦[3] 

机构地区：[1]巢湖学院化学系,安徽巢湖238000 [2]江南大学化学与材料工程学院,江苏无锡214036 [3]华东师范大学化学系,上海200062

出　　处：《冶金分析》2005年第2期10-12,共3页Metallurgical Analysis

摘　　要：研究了2 羟基3 甲氧基苯基荧光酮(HMPF)与钛的显色反应,建立了一种直接测定钢铁中微量钛的光度分析方法。在硫酸介质中,表面活性剂OP作用下,2 羟基3 甲氧基苯基荧光酮与钛形成一种红色络合物,络合物的组成为钛∶HMPF=1∶3(物质的量比),其最大吸收峰位于536nm,表观摩尔吸光系数为1 9×105,络合物在7h内稳定。在25mL溶液中,钛质量在0～3μg范围内符合比尔定律。显色反应有良好的选择性,方法简单、灵敏,可不经分离直接测定钢铁中微量钛,结果满意。A new method for spectrophotometric determination of titanium in alloy steel has been developed based on chromogenic reaction of titanium(IV) with 2-hydroxy-3-methoxyphenylfluorone (abb. HMPF). In the medium of H2SO4 and in the presence of OP, HMPF reacts with titanium(IV) to form a 1:3 red complex with a maximum absorption peak at 536 nm. The apparent molar absorptivity of the complex is 1.9 × 105 L·mol-1·cm-1. Beer's law is obeyed for the concentration of titanium(IV) in the rang of 0 - 3 μg/25 mL. The proposed method is sensitive and selective, which has been applied to determine the trace amounts of titanium in alloy steels without separation with satisfactory results.

关 键 词：苯基荧光酮 显色反应 甲氧基 羟基 表观摩尔吸光系数 应用 直接测定 表面活性剂 物质的量比 络合物 光度分析 硫酸介质 比尔定律 微量钛 钢铁 峰位 溶液 

分 类 号：TG115.33[金属学及工艺—物理冶金]