title: Analysis of risedronate and related substances by ion-pair reversed-phase high-performance liquid chromatography with evaporative light-scattering detection.
abstract: A simple method has been developed for the analysis of risedronate and related substances by ion-pair reversed-phase high-performance liquid chromatography (RPLC) with evaporative light-scattering detection (ELSD). After optimization of the chromatographic conditions, satisfactory separation of the compounds was achieved on an Intersil C(8) column with an isocratic mobile phase: 8:4:88 (v/v) acetonitrile-methanol-12 mM ammonium acetate buffer containing 35 mM n-amylamine (pH 7.0). The mobile-phase flow rate was 1.0 mL min(-1). The calibration plot was linear in the range of 352 to 1760 microg mL(-1) for risedronate. The precision and reproducibility were 0.3 and 0.5%, respectively. The average recovery of risedronate was 100.4% and the RSD was 0.6%. The method was validated and shown to be precise, accurate, and specific for the assay of risedronate in both bulk material and dosage forms. The proposed liquid-chromatographic method can be satisfactorily used for the quality control of risedronate.
authors.affiliation: Department of Pharmacy, College of Medicine of Xingtai, Hebei 054000, China. 816601@163.com
authors.forename: Lifeng
authors.initials: L
authors.lastname: Zhang
mesh_terms: D000085:Acetates / Q000032:analysis*; D002138:Calibration; D002851:Chromatography, High Pressure Liquid; D012968:Etidronic Acid / Q000031:analogs & derivatives* / Q000032:analysis; D008027:Light; D016014:Linear Models; D010710:Phosphates / Q000032:analysis*; D017905:Phosphites / Q000032:analysis*; D011725:Pyridines / Q000032:analysis*; D015203:Reproducibility of Results; D000068296:Risedronic Acid; D012542:Scattering, Radiation
chemical_list: D000085:Acetates; D010710:Phosphates; D017905:Phosphites; D011725:Pyridines; C550086:2-(3-pyridine)acetic acid; D000068296:Risedronic Acid; D012968:Etidronic Acid