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.
出处
《岩矿测试》
CAS
CSCD
北大核心
1990年第2期115-119,共5页
Rock and Mineral Analysis
关键词
钛
P-CIPE
CTMAB
分光光度法
titanium complex
quaternary complex
2,3,7-trihydroxy-9- (p-Chlorophenyl) -6-fluorone.
