示差半微分循环伏安法研究琥珀酰胆碱在水/硝基苯界面的传递行为

Study on the Transfer of Succinylcholine lon at the Water/Nitrobenzene Interface by Differential Semi-differential Cyclic Voltammetry

研究了油/水界面电解的示差半微分循环伏安行为。在0.01mol/L LiCl(w)-0.01mol/L TBATCIPB(nb)体系“电位窗”比TBATPB(nb)向正方向扩展约50mV,残余电流基本消除,使“电位窗”内的平台向左右拓宽约50mV。算得界面电容约为16μF/cm^2。考察了琥珀酰胆碱离子在w/nb界面的传递伏安特性,结果与一般半微分循环伏安法相似。但峰形改善,检测限降低一个数量级(1×10^(-6)mol/L),相对标准偏差在5％以内,可用于定量测定琥珀酰胆碱。

Differential semi-differential cyclic voltammetry (DSCV) for the electrolysis at the oil/water interface has been studied. In the system of 0.01 mol/L LiCl(w)-0.01 mol/L TBATCIPB(nb), the 'potential window' extended about 50 mV in positive direction as compared with the base electrolyte of TBATPB(nb). The residual current was almost eliminated so that both sides of the platform in the 'potential window' enlarged about 50 mV respectively. The interface capacity calculated was about 16μF/cm^2. The transfer of succinylcholine ion across the w/nb interface has been investigated by using DSCV. The characteristics of DSCV wave were similar to those of semi-differential cyclic voltammogram, but the peak shape was improved and the detection limit was decreased about 1 order (1.0×10^(-6)mol/L). The linear range was 1.0×10^(-6)～1.2×10^(-4)mol/L and the relative standard deviation was within 5%. It can be used for the determination of succinylcholine ion.