Ti-甘露醇-PV-CTMAB四元体系光度法的研究与应用  

STUDY ON THE PHOTOMETRY OF THE REACTION SYSTEM OF Ti(Ⅳ)-MANNITOL-PV-CTMAB

作　　者：张统[1] 张文英[1] 季向峰[1] 金菊[1] 

机构地区：[1]江苏扬州化工学校,扬州225002

出　　处：《理化检验（化学分册）》2001年第5期215-216,219,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：研究了以甘露醇作第二配位体 ,Ti(Ⅳ )和邻苯二酚紫 (PV)的显色条件。在pH 3的缓冲介质中 ,Ti(Ⅳ )与甘露醇、PV、CTMAB形成 1∶1∶2∶2的绿色配合物 ,最大吸收波长为 730nm ,钛在 0～2 0 μg/50ml范围内符合比耳定律 ,其表观摩尔吸光系数为 7.2× 10 4 L·cm- 1·mol- 1。用DTPA Ni掩蔽Fe(Ⅲ )等共存离子 。It is reported that in a chloroacetate buffer of pH 3, a multiligand complex is formed among the components Ti(Ⅳ)、 mannitol, pyrocatechol violet and CTMAB in a mole ratio of Ti(Ⅳ)∶Mannitol∶PV∶ CTMAB =1∶1∶2∶2, in which mannitol acts as the second ligand. The absorption maxima of this complex lies at 730nm with a molar absorptivity of 7.2×10 4L·cm -1 ·mol -1 . Beer′s law holds in the concentration range of 0～20μg of Ti(Ⅳ) in 50ml of solution. By using DTPA Ni as masking agent, the proposed method has been applied to the determination of titanium in chromium nickel steels.

关 键 词：吸光光度法 苯二酚紫 甘露醇 钛 测定 微量分析 

分 类 号：TG142.15[一般工业技术—材料科学与工程] TG115.33[金属学及工艺—金属材料]