高等学校化学学报 ›› 1995, Vol. 16 ›› Issue (10): 1514.

• 论文 • 上一篇    下一篇

高效毛细管电泳-电化学检测对多羟基抗生素分离测定的研究

方禹之, 方晓明, 叶建农   

  1. 华东师范大学化学系, 上海, 200062
  • 收稿日期:1995-04-10 修回日期:1995-06-05 出版日期:1995-10-24 发布日期:1995-10-24
  • 通讯作者: 方禹之,男,64岁,教授,博士生导师.
  • 作者简介:方禹之,男,64岁,教授,博士生导师.
  • 基金资助:

    中国科学院长春应用化学研究所电分析化学开放实验室

Determination of Polyhydroxy Antibiotics by Capillary Electrophoresis with Amperometric Detection at a Copper Electrode

FANG Yu-Zhi, FANG Xiao-Ming, YE Jian-Nong   

  1. Department of Chemistry, East China Normal University, Shanghai, 200062
  • Received:1995-04-10 Revised:1995-06-05 Online:1995-10-24 Published:1995-10-24

摘要: 用自制的高效毛细管电泳-电化学检测装置,以350μm铜圆盘电极为工作电极,在碱性溶液中,对7种多羟基抗生素的分离进行了研究。结果表明:浓度线性范围可达2至3个数量级,最低检测限为5.0×10-7mol/L.在8h内连续测定,峰电流和迁移时间的相对标准偏差分别为7.6%和2.2%.实际样品(丁胺卡那霉素)测定回收率为99.6%.

关键词: 毛细管电泳, 电化学检测, 多羟基抗生素, 铜电极

Abstract: Capillary electrophoresis(CE) was employed to separate polyhydroxy antibiotics in alkaline solution, combined with electrochemical detection at copper electrode. The electrode used was a 350 μm diameter Cu disk operated in a wall-jet configuration. Asample mixture containing 7 different polyhydroxy antibibeics was separated within 30min. The linearity varied over a 2-3 order of magnitude and the detection limits were 0.5 μmol/L.The reproducibility for the peak current and the migration time of 50 μ mol/Ldoublemycin injected every hour in a period of 8h, was 7.6% and 2.2% RSD, respectively, and the recovery of the determination of the real sample was 99.6%.

Key words: Capillary electrophoresis, Electrochemical detection, Polyhydroxy antibiotics, Copper electrode

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