DBPF-CPB-OP体系析相光度法测定痕量钛  

Determination of Trace Titanium Based on DBPF-CPB-OP by Phase Separation Spectrophotometry

作　　者：杜桂荣[1] 周发连[2] 孙占学[2] 

机构地区：[1]核工业北京化工冶金研究院,北京101149 [2]东华理工学院应用化学系,江西抚州344000

出　　处：《分析测试学报》2004年第4期75-77,80,共4页Journal of Instrumental Analysis

摘　　要：研究了在非离子表面活性剂OP存在下,钛与二溴苯基萤光酮(DBPF)和溴代十六烷基吡啶(CPB)形成三元络合物的析相显色反应。试验表明,以适量抗坏血酸、亚硫酸钠、酒石酸钾钠为掩蔽剂,控制pH值为0.5～1.0范围内,Ti-DBPF-CPB形成紫红色络合物。其λmax＝576nm,ε576＝1.56×105L·mol-1·cm-1。钛含量在0～0.5μg／mL范围内服从比尔定律。The optimum conditions of the phase separation coloring reaction of titanium with DBPF and CPB in the presence of nonionic surface_active agentOPwas studied.Usingan appropriate amountof ascorˉbic acid and sodium potassium tartrate as masking agents at the pH range of0.5～1.0,titanium reacted with DBPH and CPB to form a purplish-red complex with an apparent molar absorptivity of1.56×10 5 L·mol -1 ·cm -1 atλ 576nm .Beer′s law was obeyed for titanium concentration in the range of0～0.5 μg/mL.

关 键 词：二溴苯基萤光酮 溴代十六烷基吡啶 非离子表面活性剂OP 痕量钛 析相光度法 

分 类 号：O657.32[理学—分析化学] O614.411[理学—化学]