Chromatographia

, Volume 30, Issue 1–2, pp 80–84 | Cite as

Simultaneous determination of cefoxitin, cefuroxime, cephalexin and cephaloridine in plasma using HPLC and a column-switching technique

  • Y. J. Lee
  • H. S. Lee
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Summary

A new high performance liquid chromatographic method was developed using a column-switching technique for the simultaneous determination of cephalexin, cefuroxime, cefoxitin and cephaloridine in plasma. The plasma samples were injected onto a precolumn packed with Corasil RP C18 (37–50 μm) after simple dilution with an internal standard solution in 0.01 M acetate buffer (pH 3.5). Polar plasma components were washed out using 0.01 M acetate buffer (pH 3.5). After valve switching, the concentrated drugs were desorbed in back-flush mode and separated on a Partisil ODS-3 column using acetonitrile in 0.02 M acetate buffer (pH 4.3) (15∶85, v/v) as the mobile phase. The method showed excellent precision with good sensitivity and speed with a detection limit of 0.5 μg/ml. The total analysis time per sample was less than 25 min, and the mean coefficients of variation for intra- and inter-assay were both less than 4.9 %.

This method has been successfully applied to plasma from rats after subcutaneous injection of cefuroxime.

Key Words

Column liquid chromatography Cephalosporins Column switching in HPLC On-line plasma sample clean-up 
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Copyright information

© Friedr. Vieweg & Sohn Verlagsgesellschaft mbH 1990

Authors and Affiliations

  • Y. J. Lee
    • 1
  • H. S. Lee
    • 1
  1. 1.College of PharmacySungkyunkwan UniversitySu-WonKorea

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