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Research Paper Open Access
This article describes gas chromatography-flame ionization detection method for determination of 17 β-estradiol in rabbit plasma. 17 β-estradiol and internal standard progesterone were extracted from plasma using liquid-liquid extraction method. Linearity was found between 0.25 and 20 μg/ml (r 2 =0.994) for plasma samples. Intra-day and inter-day precision, expressed as the relative standard deviation were less than 5.5%, and accuracy (relative error) was less than 3.5%. The mean recovery of 17 β-estradiol samples was 94.4%. The limits of detection and quantification of method for plasma samples were 0.10 μg/ml and 0.15 μg/ml, respectively. Also, clinically used other 10 drugs were investigated to check for potential interferences and the method was successfully applied to the determination of 17 β-estradiol in New Zealand white rabbits.
Flame ionization detection, gas chromatography, liquid-liquid extraction, pharmacokinetics, validation, 17 ?-estradiol