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食品研究与开发:2022,43(4):169-175
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循环伏安法对果蔬制品中抗坏血酸的测定
(1.哈尔滨商业大学食品工程学院,黑龙江 哈尔滨 150028;2.中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室,甘肃 兰州 730000)
Detection of Ascorbic Acid in Fruit and Vegetable Products Using Cyclic Voltammetry
(1.Food Engineering College,Harbin University of Commerce,Harbin 150028,Heilongjiang,China;2.State Key Laboratory of Oxo Synthesis&Selective Oxidation Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,Gansu,China)
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投稿时间:2021-04-20    
中文摘要: 利用电沉积法制备甲烷氧化菌素(methanobactin,Mb)功能化纳米金(Au nanoparticles,AuNPs)修饰电极,采用循坏伏安法(cyclic voltammetry,CV)对抗坏血酸进行检测。结果表明,在电沉积扫描圈数为30,使用pH值为7.0的0.1mol/L磷酸盐缓冲溶液(phosphate buffer solution,PBS)时,抗坏血酸在修饰电极上具有良好的电流响应。在0.001 mol/L~0.030 mol/L浓度范围内,抗坏血酸浓度与峰电流呈良好的线性关系,R2为0.994 6,检出限(limit of detection,LOD)为1.32×10-6mol/L。对果蔬制品实际样品测定的加标回收率为96.3%~105.8%,为抗坏血酸的检测提供参考。
Abstract:In this study,in situ preparation of an electrode modified with methanobactin(Mb)functionalized Au nanoparticles(AuNPs)using electrodeposition was conducted.Cyclic voltammetry(CV)was used to detect ascorbic acid.The results showed that when the number of scanning cycles of electrodeposition was 30 and 0.1 mol/L phosphate buffer solution(PBS)with pH7.0was used,ascorbic acid exhibited a good current response to the electrode modified.In the concentration range of 0.001 mol/L to 0.030 mol/L,the ascorbic acid concentration had a good linear relationship with the peak current(R2=0.994 6)and the limit of detection(LOD)was 1.32×10-6mol/L.The recovery rates of standard addition for the determination of actual samples of fruit and vegetable products were 96.3%-105.8%,which provided a reference for the detection of ascorbic acid.
文章编号:202204024     中图分类号:    文献标志码:
基金项目:国家自然科学基金项目(21573055);黑龙江省财政厅、中央支持地方高校改革发展资金人才培养支持计划项目(304017);哈尔滨商业大学校级科研项目(18XN079);哈尔滨市应用技术研究与开发项目(2014RFQXJ115)
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