Determination of a new non-narcotic analgesic, DA-5018, in plasma, urine and bile by high-performance liquid chromatography |
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Authors: | Hyun Joo Shim Jong Jin Lee Sang Deuk Lee Won Bae Kim Junnick Yang So Hee Kim Myung Gull Lee |
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Affiliation: | aResearch Laboratories, Dong-A Pharmaceutical Company Ltd., 47-5 Sanggal-Ri, Kiheung-Up, Yongin-Gun, Kyunggi-Do 449-900, South Korea;bCollege of Pharmacy, Seoul National University, San 56-1, Shinlim-Dong, Kwanak-Gu, Seoul 151-742, South Korea |
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Abstract: | A high-performance liquid chromatographic method was developed for the determination of a new non-narcotic analgesic, DA-5018 (I), in rat plasma, urine and bile samples, using propranolol for plasma samples and protriptyline for urine and bile samples as internal standards. The method involved extraction followed by injection of 100 μl of the aqueous layer onto a C18 reversed-phase column. The mobile phases were 5 mM methanesulfonic acid with 10 mM NaH2PO4 (pH 2.5)-acetonitrile, 70:30 (v/v) for plasma samples and 75:25 (v/v) for urine and bile samples. The flow-rates were 1.0 ml/min for plasma samples and 1.2 ml/min for urine and bile samples. The column effluent was monitored by a fluorescence detector with an excitation wavelength of 270 nm and an emission wavelength of 330 nm. The retention time for I was 4.8 min in plasma samples and 10.0 min in urine and bile samples. The detection limits for I in rat plasma, urine and bile were 20, 100 and 100 ng/ml, respectively. There was no interference from endogenous substances. |
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Keywords: | DA-5018 N-[3-(3,4-Dimethylphenyl)propyl]-4-(2-aminoethoxy)-3-methoxyphenylacetamide hydrochloride |
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