Title of article :
Determination by liquid chromatography with fluorescence detection of total 7-ethyl-10-hydroxy-camptothecin (SN-38) in beagle dog plasma after intravenous administration of liposome-based SN-38 (LE–SN38)
Author/Authors :
Guo، نويسنده , , W. and Ahmad، نويسنده , , A. and Khan، نويسنده , , S. and Dahhani، نويسنده , , F. and Wang، نويسنده , , Y.F. and Ahmad، نويسنده , , I.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Abstract :
An HPLC– fluorescence method to quantitate total 7-ethyl-10-hydroxy-camptothecin (SN-38) in beagle dog plasma spiked with liposome based formulation of SN-38 (LE–SN38) and using camptothecin (CPT) as the internal standard (I.S.) was developed and validated to support pharmacokinetics/toxicokinetics studies. Sample preparation was done by protein precipitation using acetonitrile with 0.5% acetic acid. The supernatant was evaporated, and reconstituted in acetonitrile–20 mM ammonium acetate, pH 3.5 (20:80, v/v). When injected onto a Zorbax SB-C18 HPLC column SN-38 as well as I.S. were detected by fluorescence using an excitation at 368 nm and emission at 515 nm. The SN-38 concentrations in samples were calculated from a standard curve of peak area ratios of SN-38 to the I.S. using weighted linear regression. The sensitivity limit for SN-38 was 1.00 ng/ml in beagle dog plasma with a precision (expressed as relative standard deviation) of 12.4% and an accuracy (expressed as analytical recovery) of 104%. The assay was linear within the standard curve range of 1–750 ng/ml. Acceptable precision and accuracy were also obtained for concentrations over the balance of the standard curve range from between-run and within-run calculations.
Keywords :
SN-38 , 7-Ethyl-10-hydroxy-camptothecin , Liposome-based SN-38
Journal title :
Journal of Chromatography B
Journal title :
Journal of Chromatography B