电化学石英晶体微天平应用研究和背景扣除  

A New Method for Background Discount in the Application of Electrochemical Quartz Crystal Microbalance

作　　者：钟科军[1] 赵国玲[2] 胡彦波[1] 毛友安[1] 魏万之[1] 刘晓颖[1] 

机构地区：[1]湖南大学化学化工学院,长沙410082 [2]常德卷烟厂技术中心,常德415000

出　　处：《分析化学》2005年第7期931-934,共4页Chinese Journal of Analytical Chemistry

基　　金：教育部科学技术重点项目(No.03123);博士点基金(No.2002053200)资助

摘　　要：基于用循环伏安法研究非理想可逆体系时,电极本身的氧化峰电量与还原峰电量存在一比值。据此建立了一种用于电化学石英晶体微天平应用研究的背景扣除新方法。用这种方法研究了腺嘌呤、腺苷、腺苷一磷酸在金电极上的电化学氧化行为。结果表明:3种活性分子均能在1.2V左右氧化,对应的氧化电流大小顺序为:腺嘌呤>腺苷>腺苷一磷酸,氧化过程的电子转移数为6。The experimental results showed that the ratio of coulombic change (Q(a)/Q(c)) in working electrode was constant, when the electrochemical behavior of nonideal reversible system was studied by cyclic volammetry. Based on the result, a new method was proposed for background discount in the application of electrochemical quartz crystal microbalance and it was used to study the electrochemical behavior of adenine, adenosine and adenosine monophosphate ( AMP) on the gold electrode. The experimental result indicated that these three biological molecules could be oxidized at 1.2 V, the order of corresponding oxidation current was adenine > adenosine > AMP, and the number of transferred electron was 6 in this oxidation process.

关 键 词：电化学石英晶体微天平 背景扣除 应用 循环伏安法 电子转移数 氧化行为 活性分子 氧化过程 非理想 还原峰 氧化峰 腺嘌呤 腺苷 电量 电极 磷酸 可逆 

分 类 号：O657.1[理学—分析化学] TQ153[理学—化学]