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化学学报
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化学学报 ›› 1992, Vol. 50 ›› Issue (4): 378-382. 上一篇    下一篇

研究论文

氟哌啶的吸附溶出伏安法研究

郭旭明;胡乃非;林树昌   

  1. 北京师范大学化学系
  • 发布日期:1992-04-15

Adsorptive stripping voltammetry of droperidol

GUO XUMING;HU NAIFEI;LIN SHUCHANG   

  • Published:1992-04-15

PDF

649

被引次数

21

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~p~c=-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1.12x10^-^1^0mol.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1.0x10^-^9mol.dm^-^3。

关键词: 测定, 吸附, 还原, 氨, 汞电极, 电极反应, 吸附溶出伏安法, 底液, 氟哌啶, 氯化氨

In a supporting electrolyte containing NH3-NH4Cl, a reduction peak of droperidol (Dro) has been found by linear-sweep voltammetry at Hg electrode. The peak shows a potential of -1.46 V (Vs. Ag/AgCl) and adsorptive characteristics. When the concentration 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 mols. of Dro. The saturated amount of Dro adsorption on Hg electrode is 1.12 ?10-10 mol譪m-2 and every Dro mol. occupies 1.48 nm2. 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譫m-3.

Key words: DETERMINATION, ADSORPTION, REDUCTION, AMMONIA, MERCURY ELECTRODE, ELECTRODE REACTION, OPTIMUM CONDITION

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