摘要
以丙晞酰二茂铁基乙酯（AFcEE)和丙晞酰胺（AM)为单体，制备二茂铁基共聚物P(AFcEE-c〇-AM),采用滴涂法制得P(AFcEE-co-AM)修饰电极，通过循环伏安法和差分脉冲伏安法考察抗坏血酸（AA)在修饰电极上的电化学行为。结果表明，AA在修饰电极上的氧化峰电位比在裸玻碳电极上负移了200mV,修饰电极对AA具有明显的催化作用，属于准可逆氧化还原反应。当控制AFcEE用量为20%，以pH=6.2的NaH2P04-Na2HP04缓冲液作为测试底液时，修饰电极对AA的电催化性能最好，且具有良好的抗干扰性和重现性，在0.001~1.0mmol/L范围内，氧化峰电流与AA浓度呈现良好的线性关系，最低检出限为0.182pmol/L。将修饰电极应用于实际样品中AA的测定，回收率为98.90%~104.30%。
Copolymer based on ferrocene P( AFcEE - co - AM) was prepared with acroloyl ferrocenyl ethyl ester (AFcEE ) and acrylamide ( AM) as raw materials. P( AFcEE - co - AM) modified electrode was obtained by dripping and coating. Electrochemical behavior and determination of ascorbic acid ( AA) at the P ( AFcEE - co - AM) modified electrode was studied by cyclic voltammetry and differential pulse voltammetry.The results show that the oxidation peak potential of AA on the modified electrodes is negatively shifted by 200 mV compared with that on the bare glassy carbon electrode, modified electrode has obvious catalysis on AA, the electrochemical behavior belongs to quasi reversible redox reaction. When the dosage of AFcEE was 2 0 % , taking NaH2P0 4 - Na2HP0 4 buffer solution with pH = 6.2 as test base solution, modified electrode for AA exhibits best electric catalytic performance, and good anti - interference and repeatability. And within the range of 0? 001 ?1.0 mmol/ L, there was a good linear relation between the oxidation peak current and the concentration of AA, and the minimum detection limit was 0. 182 (xmol/ L. When modified electrode was applied to the determination of the actual sample AA, the rate recovery was 98. 9 0 % ~ 104. 3 0 % .
作者
林松柏
欧阳娜
李坤璐
LIN Songbai;OUYANG Na;LI Kunlu(College of Light - Textile Engineering, Liming Vocational University;Applied Technology Engineering Center of Fujian Provencial Higher Education for Practical Chemical Material, Quanzhou 362000, China)
出处
《黎明职业大学学报》
2016年第2期58-63,共6页
Journal of LiMing Vocational University
基金
福建省自然科学基金项目(2014J01386)
关键词
抗坏血酸
二茂铁基共聚物
修饰电极
循环伏安法
差分脉冲伏安法
ascorbic acid
copolymer based on ferrocene
modified electrode
cyclic voltammetry
differential pulse voltammetry
