An electroosmotic pump for packed capillary liquid chromatography |
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Authors: | Lingxin ChenJiping Ma Yafeng Guan |
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Institution: | Department of Analytical Chemistry and Micro-Instrumentation, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, P.O. Box 100, Dalian 116012, China |
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Abstract: | An electroosmotic pump (EOP) capable of generating pressure above 3 MPa and μl/min flow rate with reverse phase mobile phases of HPLC was constructed and evaluated. The pump consisted of three parallel connected fused silica capillary columns (25 cm×320 μm I.D.) packed with 2 μm silica materials, hollow electrodes, a high voltage DC power supply, and a liquid pressure transducer. The EOP was applied in a capillary liquid chromatographic system for mobile phase delivery instead of a mechanical pump. Standard samples containing thiourea, naphthalene, anthracene, phenanthrene and acetonitrile were separated on a 15 cm×320 μm I.D. 5 μm Chromasil C18 packed capillary column with acetonitrile/water as mobile phase. |
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Keywords: | Electroosmotic pump Micropump Capillary liquid chromatography |
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