Abstract
An HPLC method with mass-spectrometric detection was developed for simultaneous quantitative determination of chlormadinone acetate and ethinyl estradiol in human blood plasma. The sample preparation method included liquid—liquid extraction using hexane—Et2O. The method was validated for selectivity, linearity, accuracy, precision, cross-transfer, and stability. The developed method enabled simultaneous determination of the chlormadinone acetate and ethinyl estradiol blood concentrations in volunteers and could be used for pharmacokinetics studies.
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