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在NaOH底液中,双嘧达莫在汞电极上有一不可逆的线性扫描还原峰,EPC=—1.39V(vs饱和Ag/AgCl)。该峰具有明显的吸附性。当搅拌富集时间较长、双嘧达莫的浓度较小、扫描速度较快时,电极反应几乎完全为吸附态的双嘧达莫所控制。选相交流伏安等实验表明,吸附型体为双嘧达莫中性分子。测得该体系的电子转移数n为4,不可逆吸附的αnα值为1.72。探讨了双嘧达莫的电极反应机理,建立了用吸附伏安法测定双嘧达莫的最佳条件
In the NaOH bath, dipyridamole has an irreversible linear scan reduction peak at the mercury electrode with EPC = -1.39V (vs saturated Ag / AgCl). The peak has significant adsorbability. When the agitation and enrichment time is longer, the concentration of dipyridamole is smaller and the scanning speed is faster, the electrode reaction is controlled almost completely by the adsorbed dipyridamole. Selected phase AC voltammetry and other experiments show that the adsorbed body is dipyridamole neutral molecules. The electron transfer number n of this system was 4, and the αnα value of irreversible adsorption was 1.72. The electrode reaction mechanism of dipyridamole was discussed and the optimum conditions for the determination of dipyridamole by adsorption voltammetry