摘要
在NH_3-NH_4Cl底液中,氟哌啶(Dro)在汞电极上有一线性扫描还原峰。E_(pc)=-1.46V(vs.饱和Ag/AgCl电极)。该峰具有明显的吸附性。当Dro浓度较小,扫描速度较快,搅拌富集时间较长时,电极反应完全为吸附态的Dro的还原所控制。吸附粒子为Dro中性分子。测得Dro在汞电极上的饱和吸附量为1.12×10^(-10)mol·cm^(-2),每个Dro分子所占电极面积为1.48nm^2,不可逆吸附的转移系数α为0.58。并建立了吸附溶出伏安法测定Dro的最佳条件,最低检测限为1.0×10^(-9)mol·dm^(-3)。
In a supporting electrolyte containing NH_3-NH_4Cl, a reduction peak of droperidol (Dro) has been found by linearsweep voltammetry at Hg electrode. The peak shows a potential of -1.46V (vs. &g/AgCl) and adsorptive characteristics. When the concontration of Dro is sufficiently small, the sweep rate sufficiently rapid and the accumulating time sufficiently long, the peak current is totally contributed by the reduction of adsorbed Dro. The adsorbed species is most probably neutral molecules of Dro. The saturated amount of Dro adsorption on Hg electrode is 1.12×10^(-10)mol·cm^(-2) and every Dro molecule occupies 1.48nm^2. The transfer coefficient a of the irreversible adsorptive system of Dro is found to be 0.58. The detection limit of adsorptive stripping voltammetry of Dro is 1.0×10^(-9)mol·dm^(-3).
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1992年第4期378-382,共5页
Acta Chimica Sinica
基金
国家自然科学基金资助的课题
