Measuring Vitamin C Content of Commercial Orange Juice Using a Pencil Lead Electrode
Measuring Vitamin C Content of Commercial Orange Juice Using a Pencil Lead Electrode
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DOI：
10.1021/ed800151x
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发表时间：
2010-05-01
影响因子：
3
通讯作者：
Kariuki, James
中科院分区：
文献类型：
--
作者：
King, David;Friend, Jeffrey;Kariuki, James
用铅笔芯作电极，成功地测定了市售橙子汁中的抗坏血酸。以循环伏安法为电化学探针，测定了不同电极上抗坏血酸氧化产生的电流。数据表明，较便宜的铅笔芯电极给出的结果与较昂贵的商业碳电极的结果相当。测量的维生素C水平高于加拿大卫生部和美国食品和药物管理局推荐的每日摄入量，即健康成年人每天60毫克。测定了铅笔芯电极的检出限。
A pencil lead successfully served as an electrode for the determination of ascorbic acid in commercial orange juice. Cyclic voltammetry was used as an electrochemical probe to measure the current produced from the oxidation of ascorbic acid with a variety of electrodes. The data demonstrate that the less expensive pencil lead electrode gives results that are comparable to those of a more expensive commercial carbon electrode. The level of vitamin C measured was higher than the daily intake recommended by Health Canada and the United States Food and Drug Administration, which is 60 mg/day for a healthy adult. The detection limit of the pencil lead electrode was also determined.