摘要
在HAc-NaAc(pH为6.2)存在下,Ti(Ⅳ)—PAR—KBrO_3体系形成一灵敏的催化波,峰电位为-1.08V(vs.SCE),Ti(Ⅳ)浓度在1.0×10^(-8)～8.0×10^(-7)mol/L范围与峰电流成线性关系,络合物的络合比为Ti(Ⅳ):PAR=1:1,实验证明该波为络合吸附催化波。可用于痕量Ti(Ⅳ)的测定。
In the presence of 0.07mol/L HAc-NaAc, 4×10-8mol/L PAR, 4×10-2mol/L KBrO3, at pH 6.2, a sensitive catalytic wave of Ti(Ⅳ)-PAR complex is formed by oscillopolarogvaphy. The peak potential is - 1.08V(vs.SCE). The change of the peak height with the concentration of Ti(Ⅳ)appears linear in the range
1.0×10-8-8.0×10-7mol/L, The composition of the complex Ti(Ⅳ) :PAR =1:1.
It is proved that the electrode process is that a Ti(Ⅳ)-PAR complex is first formed, then the complex adsorbed on the surface of the electrode. The Ti(Ⅳ) in the complex is reduced, Ti(Ⅲ) is oxidized by KBrO3.Ti(Ⅳ) is reduced again to yield the catalytic adsorptive camplex wave.
出处
《岩矿测试》
CAS
CSCD
北大核心
1989年第3期173-176,共4页
Rock and Mineral Analysis
基金
国家自然科学基金资助项目
