摘要
本文研究了锡-没食子酸丙酯配合物在甲酸盐缓冲溶液(pH3.5)中的吸附溶出行为。峰电位在-0.54V(vs.Ag/AgCl)。峰高与锡浓度在4.2×10^(-10)—1.7×10^(-7)mol/L范围内呈线性关系。探讨了反应机理。试验证实,锡配合物在汞电极上的吸附符合Frumkin等温式,测得吸附系数β=5.8×10~5,吸引因素a=0.71。
In 0.10 mol/L formate buffer solution at pH 3.5 containing 4.0×10^(-5)mol/L propyl gallate and 0. 02% ascorbic acid, a sensitive adsorptive complex wave of tin-propyl gallate was obtained at -0. 54V(vs.Ag/AgCl)using linear sweep voltammetry. The peak height is linearly proportional to the concentration of tin in the range of 4. 2×10^(-10)～1. 7×10^(-7)mol/L. The reaction mechanism was discussed. The adsorption of the complex on the surface of mercury electrode obeys Frumkin adsorption isotherm. The adsorption coefficient(β=5. 8×10~5), the attractive factor(a=0.71)and amount of saturated adsorption(Γ_(max)=2. 1×10^(-10)mol/cm^2)were determined. The proposed method has been applied to determine trace tin in zinc alloys with satisfactory results.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1990年第5期447-450,共4页
Chinese Journal of Analytical Chemistry
基金
中国科学院基金
关键词
锡
没食子酸丙酯
吸附
溶出伏安法
Tin
Propyl gailate
Adsorptive stripping voltammetry
