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- W1976011750 abstract "A sensitive and selective HPLC-MS-MS method was developed for the determination of trimebutine maleate (TM) and its major metabolites N-monodemethyltrimebutine (TM-MPB), N-didemethyltrimebutine (APB) and 3,4,5-trimethoxybenzoic acid (TMBA) in human plasma. The analytes were extracted from plasma samples by liquid-liquid extraction and chromatographed on a YMC J'sphere C(18) column. The mobile phase consisted of 2 mM ammonium acetate buffer (pH 6.5)-methanol (20:80, v/v), and at a flow-rate of 0.2 ml/min. Detection was carried out on a triple quadrupole tandem mass spectrometer in multiple reactions monitoring (MRM) mode using positive-negative switching electrospray ionization (ESI). The method was validated over the concentration range of 1-100 ng/ml for trimebutine maleate and APB, 1-500 ng/ml for MPB, and 50-10,000 ng/ml for TMBA. Inter- and intra-day precision (RSD%) for trimebutine maleate and its three metabolites were all within +/-15% and the accuracy was within 85-115%. The limit of quantitation was 1 ng/ml for trimebutine maleate, TM-MPB and APB, and 50 ng/ml for TMBA. The extraction recovery was on average 58.2% for trimebutine maleate, 69.6% for MPB, 51.2% for APB and 62.5% for TMBA. The method was applied to the pharmacokinetic study of trimebutine maleate and its metabolites in healthy Chinese volunteers." @default.
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- W1976011750 date "2002-11-01" @default.
- W1976011750 modified "2023-10-14" @default.
- W1976011750 title "Quantitative determination of trimebutine maleate and its three metabolites in human plasma by liquid chromatography-tandem mass spectrometry" @default.
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- W1976011750 doi "https://doi.org/10.1016/s1570-0232(02)00369-0" @default.
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