单分子聚苯胺膜电极上抗坏血酸的线性扫描催化氧化波研究  

Investigations on Linear Sweep Catalytic Oxidation Wave of Ascorbic Acid at Monolayer PANI Film Modified Electrode

作　　者：张家祥[1] 尹斌[1] 张祖训[1] 

机构地区：[1]南京大学化学系

出　　处：《化学学报》1995年第11期1124-1130,共7页Acta Chimica Sinica

基　　金：国家自然科学基金;南京大学分析测试中心资助项目.

摘　　要：在苯胺浓度为1.0mol·dm^(-3)的盐酸溶液中用电化学聚合法制得单分子聚苯胺膜电极.在该修饰电极上,抗坏血酸在0.01mol·dm^(-3)盐酸底液中有一线性扫描催化氧化波,其峰电位为+0.270V(VS、SCE),峰电流与抗坏血酸浓度在 10^(-2)～10^(-5)mol·dm^(-3)范围内呈线性关系.文中详细地探讨了该波的性质,证实它是一个不可逆波,并且测定了α_An,k_s,D_R值.Monolayer PANI film modified electrode was prepared by electrochemical polymerization in HCl solution containing 1.0mol ·dm-3 aniline monomer. Ascorbic acid has a catalytic oxidation wave on linear potential sweep at the modified electrode in 0.01mol ddddddddd dm-3 HCl solution. The peak potential of the wave is 0.270V (vs. SCE). The peak current of the wave has a linear relation with the concentration of ascorbic acid in the range of 10-2-10-5mol·dm-3. The oxidation wave was found to be a irreversible wave. The values of αAn, ks, DR were deduced from experimental data.

关 键 词：聚苯胺膜电极 伏安法 催化氧化波 维生素C 

分 类 号：Q564[生物学—生物化学] O657.1[理学—分析化学]