钛-氨三乙酸-对氯苯基荧光酮-CTMAB四元配合物的分光光度法研究  

Spectrophotometric Study on the Quaternary Complex of Ti-NTA -p-CIPF-CTMAB System

作　　者：王东进[1] 谢增鸿[1] 樊祺泉 蔡文进[1] 黄炳俊 张振欣 

机构地区：[1]福州大学化学系

出　　处：《岩矿测试》1990年第2期115-119,共5页Rock and Mineral Analysis

摘　　要：本文研究Ti(Ⅳ)-氨三乙酸(NTA)-对氯苯基荧光酮(p-ClPF)-CTMAB四元配合物的显色条件。结果表明,在pH5.8—6.6形成了摩尔比为Ti(Ⅳ):NTA:p-ClPF:CTMAB=1:1:3:3的四元配合物,借此反应测定钛,灵敏度高,其ε_(573nm)=2.1×10~5L·mol^(-1)·cm^(-1)。Ti(Ⅳ)浓度在0—1.4μg/10ml范围服从比耳定律。已用本法直接测定了岩矿和铝合金中的Ti,结果满意。A new highly sensitive colour reaction of titanium (Ⅳ)with nitrilotriacetic acid (NTA), 2,3,7-trihydroxy-9-(p-Chlorophenyl)-6-fluorone(p-ClPF) and ce-tyltrimethylammonium bromide (CTMAB) has been studied. It is shown that titanium (Ⅳ ) can form a quaternary complex with the above mentioned reagents at pH 5.8-6.6. The complex is stable for at least 1.5h. The molar absorptivity of the complex is 2.1 × 105L·mol-1·cm-1 at 573nm. The molar ratio of the Ti(Ⅳ)/NTA/p-ClPF/CTMAB complex is estimated to be 1: 1:3:3. Beer's law is obeyed for titanium in the range of 0-1.4 μg/ 10ml. Tolerance limits in the presence of masking agents are listed for 30 cations. The method has been successfully applied to the determination of titanium in silicate rocks and aluminum alloy without separation.

关 键 词：钛 P-CIPE CTMAB 分光光度法 

分 类 号：O614.411[理学—无机化学]