石墨烯修饰电极伏安法测定食品中的草酸  

Voltammetric Determination of Oxalic Acid in Foods with Graphene Modified Electrode

作　　者：习霞[1] 明亮[1] 

机构地区：[1]南通大学化学化工学院,南通226007

出　　处：《食品工业》2013年第2期174-176,共3页The Food Industry

基　　金：南通大学自然科学项目(10Z015);南通市应用研究科技计划项目(K2006018)

摘　　要：建立了利用石墨烯修饰玻碳电极,线性扫描伏安法测定食品中的草酸的新方法。优化了包括支持电解质、修饰剂用量、富集电位及时间等测定条件。在优化试验条件下,氧化峰电流与草酸浓度在1.0×10^(-5)～1.0×10^(-3)mol/L范围内呈现良好的线性关系,检出限为4.0×10^(-)mol/L(S/N=3)。该方法简单、快速、灵敏,将其用于食品中草酸含量的测定,结果满意。Abstract A novel method for the determination of oxalic acid in foods was developed by linear sweep voltammetry （LSV） with graphene modified glassy carbon electrode （GCE）. The experimental parameters such as the supporting electrolyte, the amount of modifier, the accumulation potential and time were optimized. Under the optimized experimental conditions, the oxidation peak current was proportional to the concentration of oxalic acid over the range from 1.0× 10-5 to 1.0× 10-3 mol/L with a detection limit of4.0×10-6 mol/L （S/N=3）. The proposed method is simple, rapid and sensitive and can be used for the determination of oxalic acid in foods with satisfactory results.

关 键 词：草酸 石墨烯 线性扫描伏安法 化学修饰电极 

分 类 号：TS207.3[轻工技术与工程—食品科学] O657.1[轻工技术与工程—食品科学与工程]