钛-间溴苯基荧光酮-Tween-80显色反应研究

钛-间溴苯基荧光酮-Tween-80显色反应研究 SPECTROPHOTOMETRIC DETERMINATION OF MICROAMOUNTS OF TITANIUM IN STEEL WITH m-BROMOPHENYLFLUORONE IN THE PRESENCE OF NONIONIC SURFACTANT 彭维豪 Peng Weihao Zhang Huashan Yu Zhongyi 1 first-author 张华山 1 喻忠义 1 武汉大学化学系 武汉大学化学系 Department of Chemistry,Wuhan University Department of Chemistry,Wuhan University 研究了钛-间溴苯基荧光酮（m-BPF）-Tween-80三元络合物显色体系及分光光度法测定微量钛的条件。结果表明,在0.1～0.2mol/L 硫酸介质中,当 Tween-80存在时,钛与间溴苯基荧光酮生成红色三元络合物,λ max =538nm,Ti（Ⅳ）:m-BPF=1:4,ε=2.0×10 5 ,钛在0.0～2.8μg/10ml 范围内遵守比尔定律。本法灵敏度高,选择性好,用来测定钢铁中微量钛,方法简便,快速,结果满意。 A colour reaction of titaniun with m-bromophenylfluorone（m-BPF）and tween-80 has been studied spectrophotometrically.It is shown that titanium can form a ternary complex with the above reagents at 0.1～0.2NH 2 SO 4 . The complex is stable at least 24h.The apparent molar absorptivity of the complex is 2.0×10 5 at 538nm,and the composition ratio of Ti（Ⅳ）:m-BPF is 1:4.Beer’s law is obeyed for titanium in the range of 0.0～2.8μg/10mL.The ternary complex has better analytical characteristics than the other complex. A simple and highly selective method has been successfully applied to the determination of titanium in alloy steels without separating Ti from its acco- mpanying elements. 钛 溴苯基荧光酮 显色反应 分光光度法 titaniun m bromophenylfluorone colour reaction spectro photometrically 1990-01-01 2021-04-01 1