| 利用聚镁试剂薄膜修饰电极测定维生素C |
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| 引用本文： | 周谷珍,鄢美姣,孙元喜.利用聚镁试剂薄膜修饰电极测定维生素C[J].湖南文理学院学报(自然科学版),2015(3):29-32. |
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| 作者姓名： | 周谷珍 鄢美姣 孙元喜 |
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| 作者单位： | 湖南文理学院化学化工学院，湖南常德，415000 |
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| 摘 要： | 利用循环伏安法研究了聚镁试剂薄膜修饰电极(PMSJE)的制备条件,详细讨论了该修饰电极对维生素C(Vc)的电催化作用。实验结果表明,在0.01 mol/L H2SO4+0.1 mol/L KNO3体系中,Vc的摩尔浓度在1.0×10-2~3.0×10-4 mol/L范围内,氧化峰电流与浓度呈良好的线性关系,检出限可达2×10-5 mol/L。8次平行样品测定结果的相对标准偏差为1.1%,样品回收率为93.6%~109.8%。
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| 关 键 词： | 聚镁试剂 薄膜修饰电极 测定 维生素C |
The determination of Vitamin C using poly-magnesonl film modified eletrode |
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| Abstract: | The preparation conditions and electrocatalsis raction on Vitamin C (Vc) of poly-magnesonl film modified electrode (PMSJE) are studied by the circulation voltammetry. In 0.01 mol/L H2SO4+ 0.1 mol/L KNO3, the concentration of Vitamin C has a good linear relations in 1.0 × 10?2~3.0 × 10?4mol/L with the oxy-peak current, detection limit reaches 2 × 10?5mol/L. The sample is tested eight times, the relative standard deviation (RSD) of which is not more than 1.1% and the recovery rate of sample is 93.6%~109.8%. |
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| Keywords: | poly-magnesonl film modified electrode determination Vitamin C |
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