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胆固醇是一种重要的生化物质,对心血营病的发生有很大影响,有关研究颇受人们关注。在胆固醇分子中,除去一般烷烃结构外,仅有一个独立的双键和羟基,经典极谱学认为,这一类官能团不能在电极上还原或氧化,即不具有电活性。作者发现胆固醇在悬汞电极上有明显的吸附现象,吸附后的胆固醇能够发生电极反应。本文用线性扫描伏安法和计时库仑法研究了胆固醇吸附的条件和性质,并对电极上发生的氧化还原反应机理进行了探讨。
Cholesterol is an important biochemical substance, which has a great impact on the occurrence of cardiovascular disease, and the research is attracting much attention. In cholesterol molecules, except for the common alkane structure, there is only one independent double bond and hydroxyl group. According to classical polarography, this type of functional group can not be reduced or oxidized on the electrode, that is, it has no electroactivity. The authors found that there is a significant adsorption of cholesterol on the hanging mercury electrode and that the adsorbed cholesterol can undergo electrode reaction. In this paper, linear sweep voltammetry and chronocoulometry were used to study the conditions and properties of cholesterol adsorption, and the redox reaction mechanism on the electrode was discussed.