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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~（－７）ｍｏｌ／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％。
The separation of seven kinds of polyhydroxyl antibiotics was studied in alkaline solution using a homemade high-performance capillary electrophoresis-electrochemical detector with 350μm copper disk electrode as the working electrode. The results showed that the linear range of the concentration was 2 to 3 orders of magnitude and the minimum detection limit was 5.0 × 10 -7 mol / L. The relative standard deviations of peak current and migration time were 7.6% and 2.2%, respectively, in continuous measurements within 8h. The actual sample (amikacin) has a recovery of 99.6%.