| 毛细管电泳法检测果汁中的抗坏血酸 |
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| 引用本文： | 李玲君,王军.毛细管电泳法检测果汁中的抗坏血酸[J].滨州学院学报,2012(6):96-100. |
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| 作者姓名： | 李玲君 王军 |
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| 作者单位： | 山东师范大学化学化工与材料科学学院,山东济南250014 |
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| 基金项目： | 山东省自然科学基金资助项目（Y2007B28） |
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| 摘 要： | 采用电化学沉积将铂纳米颗粒固定到碳纤维微电极上,制备了一种新型铂纳米颗粒修饰微电极.将铂纳米颗粒修饰微电极与毛细管电泳联用,对抗坏血酸进行了检测.探讨了铂的电沉积时间、电位,氯铂酸的浓度,缓冲溶液pH、浓度,检测电势和分离电压等对该电极的影响.实验结果表明,该电极对抗坏血酸的线性范围为1.0×10-6～8.0×10-6 mol/L和8.0×10-6～1.0×10-3 mol/L,相关系数分别为0.998 1和0.999 2,信噪比为3时,检出限为8.0×10-7 mol/L.利用该电极实现了果汁中抗坏血酸的定量检测.
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| 关 键 词： | 铂纳米颗粒 毛细管电泳 电化学检测 果汁 抗坏血酸 |
Determination of Ascorbic Acid in Fruit Juice by Capillary Electrophoresis with Electrochemical Detection |
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| LI Ling-jun,WANG Jun.Determination of Ascorbic Acid in Fruit Juice by Capillary Electrophoresis with Electrochemical Detection[J].Journal of Binzhou University,2012(6):96-100. |
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| Authors: | LI Ling-jun WANG Jun |
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| Institution: | (College of Chemistry Chemical Engineering and Materials Science, Shandong Normal University, J inan 250014, China) |
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| Abstract: | In this paper, the Pt nanoparticles（PtNPs）are electrodeposited on the surface of a self made assembled carbon fiber micro-disk bundle electrode（CFME）. Ascorbic acid（AA）is detected by capillary zone electrophoresis with electrochemical detection at the electrode. Under optimized experimental conditions,the concentration linear range of AA is from 1.0×10-6 to 8.0×10-6 mol/L and 8.0×10-6 to 1.0×10-3 mol/L with correlation coefficients of 0. 998 1 and 0. 999 2. When the signal-to-noise ratio is 3,the concentration limit of detection of AA is 8.0×10-7 mol/L. This method is successfully applied to detect AA in fruit juice. |
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| Keywords: | Pt nanoparticle capillary electrophoresis electrochemical detection fruit juice ascorbic acid |
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