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Automated Stability-Indicating High-Performance Liquid Chromatographic Assay for Ethinyl Estradiol and (Levo)norgestrel Tablets

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Abstract

An automated high-performance liquid chromatography (HPLC) assay for ethinyl estradiol and norgestrel or levonorgestrel in oral contraceptive tablets was developed. Tablets were prepared for on-line injection using a solid sampler and segmented continuous flow techniques. The active components were separated from tablet excipients, impurities, and degradation products on reversed-phase C8 and C18 columns by elution with water–acetonitrile–methanol (45:35:15). A UV detector connected in series with a fluorometric detector measured the UV absorbance of levonorgestrel and norgestrel at 240 nm and the fluorescence of ethinyl estradiol at 310 nm (excitation at 210 nm). The method employed computer control of the injection system and solid sampler for synchronization of the chromatographic and segmented flow streams. The method is applicable for content uniformity and stability testing at a rate of eight samples per hour.

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Authors and Affiliations

  1. Analytical Research and Development Division, Wyeth Laboratories, Inc, P.O. Box 8299, Philadelphia, Pennsylvania, 19101

    Van D. Reif & Nicholas J. DeAngelis

  2. Smith Kline French Laboratories, 600 Allendale Road, King of Prussia, Pennsylvania, 19406

    W. Mark Eickhoff

  3. Department of Engineering, Pennsylvania State University, State College, Pennsylvania, 16801

    John K. Jackman

Authors
  1. Van D. Reif
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  2. W. Mark Eickhoff
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  3. John K. Jackman
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  4. Nicholas J. DeAngelis
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Reif, V.D., Eickhoff, W.M., Jackman, J.K. et al. Automated Stability-Indicating High-Performance Liquid Chromatographic Assay for Ethinyl Estradiol and (Levo)norgestrel Tablets. Pharm Res 4, 54–58 (1987). https://doi.org/10.1023/A:1016434028376

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  • DOI: https://doi.org/10.1023/A:1016434028376

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