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在NH_(3-)NH_4Cl底液中,对氟-γ-(4-二苯甲基哌嗪-1)-丁酰苯(FDB)在汞电极上有一线性扫描还原峰.E_(pc)=-1.43V(vs.饱和Ag/AgCl电极)。该峰具有明显的吸附性.当FDB浓度较小,扫描较快,搅拌富集时间较长时,电极反应完全为吸附态的FDB的还原所控制。吸附粒子为FDB中性分子.测得FDB在汞电极上的饱和吸附量为7.04×10~(-11)mol/cm~2。每个FDB分子所占电极面积为2.34 nm~2,不可逆吸附的转移系数α为0.64.并建立了吸附伏安法测定FDB的最佳条件.当富集时间为300s时,最低检测限可达5.0×10~(-10)mol/L.
In the NH_ (3) NH_4Cl solution, there is a linear reduction peak at the mercury electrode for fluorine-γ- (4-benzhydrylpiperazine-1) -butyrylbenzene (FDB) -1.43V (vs. Saturated Ag / AgCl electrode). The peak has obvious adsorbability.When the concentration of FDB is small, the scanning speed is faster and the enrichment time is longer, the electrode reaction is completely controlled by the reduction of the adsorbed FDB. The adsorbed particles were FDB neutral molecules, and the saturated adsorption capacity of FDB on mercury electrode was 7.04 × 10 ~ (-11) mol / cm ~ 2. Each FDB molecule occupies an electrode area of 2.34 nm ~ 2, and the irreversible adsorption transfer coefficient α is 0.64. The optimal conditions for the determination of FDB by adsorption voltammetry are established. When the enrichment time is 300 s, the minimum detection limit 5.0 × 10 ~ (-10) mol / L.