title: Determination of amosulalol in human plasma using solid-phase extraction combined with liquid chromatography and ultraviolet detection.
abstract: Amosulalol is an antihypertensive drug with selective postsynaptic alpha 1 and non-selective beta blocking effects. A simple solid-phase extraction and high-performance liquid chromatographic (HPLC) method has been developed and validated for the quantitative determination of amosulalol in human plasma. A reversed phase C18 column was used for the separation of amosulalol and ethyl paraben (internal standard) with a mobile phase composed of 0.025 M phosphate buffer (pH 6.0).acetonitrile (73:27, v/v) at a flow rate of 1.5 mL/min. The ultraviolet detector was operated at the 272 nm wavelength. Intra- and inter-day precision and accuracy were acceptable for all quality control samples including the lower limit of quantification of 30 ng/mL. Recovery of amosulalol from human plasma was >95.6%. Amosulalol was stable in human plasma under various storage conditions. This method was used successfully for a pharmacokinetic study in plasma after oral administration of a single 20 mg dose of amosulalol hydrochloride to 16 healthy volunteers.
authors.affiliation: College of Pharmacy, Ewha Womans University, 11-1 Daehyun-Dong, Seodaemun-Gu, Seoul 120-750, South Korea.
authors.forename: Hye Sun
authors.initials: HS
authors.lastname: Gwak
authors.forename: Eun Sun
authors.initials: ES
authors.lastname: Noh
authors.forename: Nah Young
authors.initials: NY
authors.lastname: Lee
authors.forename: In Koo
authors.initials: IK
authors.lastname: Chun
mesh_terms: D000328:Adult; D000959:Antihypertensive Agents / Q000097:blood* / Q000302:isolation & purification / Q000493:pharmacokinetics; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004983:Ethanolamines / Q000097:blood* / Q000302:isolation & purification / Q000493:pharmacokinetics; D005260:Female; D006801:Humans; D008297:Male; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D000096926:Benzenesulfonamides
chemical_list: D000959:Antihypertensive Agents; D004983:Ethanolamines; C032473:amosulalol; D000096926:Benzenesulfonamides