title: Development and optimization of a stability indicating method on a monolithic reversed-phase column for Colchicum dry extract.
abstract: This article presents a method developed on a monolithic reversed-phase column for separation of related alkaloids and degradation products from colchicine in dry extract preparations from Colchicum seeds. Optimization was performed using an optimization software with variation of the pH of the mobile phase and the percentage of organic modifier. This method permits for the first time a fast separation of all alkaloids including colchiceine without prior derivatization or complexation with excellent linearity, precision and low limits of quantitation which makes it a suitable method for stability testing of extracts or drug formulations containing extracts of Colchicum seeds.
authors.affiliation: Solvay Pharmaceuticals GmbH, Analytical Support Department, Marketed Product Support, Hans-Böckler, Allee 20, PO box 220, 30173 Hannover, Germany. andreas.koerner@solvay.com
authors.forename: Andreas
authors.initials: A
authors.lastname: Körner
authors.forename: Silke
authors.initials: S
authors.lastname: Kohn
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods*; D003079:Colchicum / Q000737:chemistry*; D004492:Edetic Acid; D006863:Hydrogen-Ion Concentration; D010936:Plant Extracts / Q000737:chemistry*
chemical_list: D010936:Plant Extracts; D004492:Edetic Acid