alexa High-performance liquid chromatographic analysis of melatonin in human plasma and rabbit serum with on-line column enrichment.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Bioequivalence & Bioavailability

Author(s): Bechgaard E, Lindhardt K, Martinsen L

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Abstract This paper describes the development of a simple and sensitive analytical method for the quantification of melatonin in human plasma and rabbit serum, using standard analytical equipment and on-line column enrichment without prior extraction, clean-up or derivatization. The analytical procedure was found to be accurate, precise and linear. For human plasma, the accuracy was 101\% (range 89-106\%), and the mean precision was 5\% (range 2-9\%) for all concentrations (0, 2, 10, 50 and 200 ng/ml) tested (n=6). The accuracy in rabbit serum was 101\% (range 90-112\%), and the mean precision was 13\% (range 8-19\%) for all concentrations (0, 2, 10, 50, 200 and 500 ng/ml) tested (n=6). The retention time of melatonin was about 8 min and the total recoveries were found to be approximately 65 and 85\%, respectively, for human plasma and rabbit serum. The limit of detection was found to be lower than 1 ng/ml for human plasma and around 2 ng/ml for rabbit serum. The method is, therefore, found to be suitable for melatonin bioavailability studies in rabbits and presumably also in humans.
This article was published in J Chromatogr B Biomed Sci Appl and referenced in Journal of Bioequivalence & Bioavailability

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