青蒿素在银电极上的电化学行为及其定量分析

Electrochemical behavior and of QHS at Ag electrode and its determination

在乙醇(1+4)+B R缓冲溶液(pH7.2)中,青蒿素在银电极上有一灵敏的还原峰,无氧化峰,峰电位为-0.64V(vs.SCE)。2 5次微分线性扫描伏安(2 5thLSV)峰电流与青蒿素的浓度在8.0×10-6～1.0×10-3mol L范围内成线性关系(r=0.9994),检出限为5.0×10-6mol L,该法已用于人工合成样品分析,优于紫外测定法。

In the solution of ethanol (1+4) and B-R buffer, arterminin (QHS) showed a sensitive reductive peak at -0.64 V vs. SCE at Ag electrodes. There was a linear relationship between peak current of 2.5th LSV and concentration of QHS in the range of 8.0×10^(-6)～1.0×10^(-3) mol/L( r =0.9994) with the detection limit of 5.0×10^(-6) mol/L.