title: Reliability of computer-assisted method transfer between several column dimensions packed with 1.3-5μm core-shell particles and between various instruments.
abstract: In this contribution, the possibility to automatically transfer RPLC methods between different column dimensions and instruments was evaluated using commercial modelling software. The method transfer reliability was tested with loratadine and its 7 related pharmacopeial impurities. In this study, state-of-the-art columns packed with superficially porous particles of 5, 2.6, 1.7 and 1.3μm particles were exclusively employed. A fast baseline separation of loratadine and related impurities (Rs,min=2.49) was achieved under the best analytical conditions (i.e. column of 50mm×2.1mm, 1.3μm, 10-90% ACN in 5min, T=40°C, pH=3, F=0.5ml/min). This optimal method was successfully tested on columns packed with other particle sizes, namely 1.7 and 2.6μm, to reduce pressure drop. The selectivities and retentions remained identical, while the peak widths were logically wider, leading to a reduction of peak capacity from 203 to 181 and 159 on the 1.3, 1.7 and 2.6μm particles, respectively. On the minimum, the resolution was equal to 1.54 on the 50mm×2.1mm, 2.6μm stationary phase. Next to this, the method was transferred to columns of different lengths, inner diameters and particle sizes (100mm×3mm, 2.6μm or 150mm×4.6mm, 5μm). These columns were used on other LC instruments possessing larger dwell volumes. The modelling software employed for developing the original method was able to calculate the new gradient conditions to be used. The accuracy of prediction was excellent, as the average retention time errors between predicted and observed chromatograms were -0.11% and 0.45% when transferring the method to 100mm×3mm and 150mm×4.6mm columns, respectively. This work proves the usefulness and validity of HPLC modelling software for transferring methods between different instruments, column dimensions and/or flow rates.
authors.affiliation: Egis Pharmaceuticals Plc., Keresztúri út 30-38, Budapest 1106, Hungary.
authors.forename: Róbert
authors.initials: R
authors.lastname: Kormány
authors.affiliation: Budapest University of Technology and Economics, Department of Inorganic and Analytical Chemistry, Szt. Gellért tér 4, Budapest 1111, Hungary.
authors.forename: Jenő
authors.initials: J
authors.lastname: Fekete
authors.affiliation: School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Boulevard d'Yvoy 20, 1211 Geneva 4, Switzerland.
authors.forename: Davy
authors.initials: D
authors.lastname: Guillarme
authors.affiliation: School of Pharmaceutical Sciences, University of Geneva, University of Lausanne, Boulevard d'Yvoy 20, 1211 Geneva 4, Switzerland. Electronic address: szabolcs.fekete@unige.ch.
authors.forename: Szabolcs
authors.initials: S
authors.lastname: Fekete
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004340:Drug Contamination; D008956:Models, Chemical; D010316:Particle Size; D004364:Pharmaceutical Preparations / Q000032:analysis / Q000737:chemistry; D015203:Reproducibility of Results; D012984:Software
chemical_list: D004364:Pharmaceutical Preparations
keywords: Core–shell particles; DryLab; Method development; Method transfer; Modelling software