摘要
在表面活性剂聚乙烯醇与吐温80存在下,钛与苯基荧光酮形成灵敏度很高的络合物,最大吸收波长位于535nm,钛含量在0～6μg/50ml符合比尔定律,摩尔吸光系数ε=1.8×10~5,方法灵敏。以氢溴酸挥发消除Sb,Bi,Sn,Ge等元素的干扰,以抗坏血酸还原消除Fe^(3+),V(Ⅴ)等高价元素的影响,方法具有较好的选择性。以Fe(OH)_3共沉淀钛与基体锌分离,测定了高纯锌中痕量钛,RSD为9.1%,加标回收率94%～105%。
In the presence of surfactant PVA-Tween 80, Ti (Ⅳ) can form a colored complex with phenylfluorone, with maximum absorption at 535nm, molar absorptivity (ε) being 1.8×10~5 L·mol^(-1)·cm^(-1), following Beer's law range from 0 to 0.12 mg/L. The interference of Sb^(3+), Bi^(3+), Sn^(2+), Ge^(4+) was eliminated by hydrobromic acid, and that of Fe^(3+), V (Ⅴ) was eliminated by ascorbic acid. Fe (OH)_3 was used to coprecipitate Ti(Ⅳ) from zinc base. Trace titanium in high-purity zinc ingot was determined. The relative standard deviation was 9.1% and the recovery was 94%-105%.
出处
《冶金分析》
CAS
CSCD
北大核心
1997年第4期16-17,12,共3页
Metallurgical Analysis
