title: Evaluation of the performance of commercially available polysaccharide-based chiral stationary phases after multicycle operation in multimodal elution mode.
abstract: The performance of four commercially available polysaccharide-based chiral stationary phases, Chiralcel OD, Chiralcel OJ, Chiralpak AD and Chiralpak AS was evaluated after several cycles of extended multimodal operations. Acetonitrile, methanol, ethanol and their mixtures were chosen for polar-organic mobile phases, ethanol-n-heptane mixture and n-heptane were selected for normal-phase mode. Retention factor (k), selectivity (alpha), resolution (Rs) and theoretical plate count (N) were the chosen parameters to describe the column performance. One racemate for which all four columns have shown enantioselectivity was chosen as test compound. After 15 cycles of multimodal operations a slight decrease was seen in the retention factors (k) however, column efficiency, selectivity (alpha) and resolution (Rs) were maintained.
authors.affiliation: Department of Chemical Process Control, Johnson and Johnson Pharmaceutical Research and Development, A Division of Janssen Pharmaceutica N.V., Turnhoutseweg 30, B-2340 Beerse, Belgium. gtorok@prdbe.jnj.com
authors.forename: Gabriella
authors.initials: G
authors.lastname: Török
authors.forename: Ludwig
authors.initials: L
authors.lastname: Goetelen
authors.forename: Raf
authors.initials: R
authors.lastname: Luyckx
authors.forename: Peter
authors.initials: P
authors.lastname: Van Broeck
mesh_terms: D000097:Acetonitriles / Q000737:chemistry; D002626:Chemistry, Pharmaceutical / Q000379:methods*; D002845:Chromatography; D002851:Chromatography, High Pressure Liquid; D004345:Drug Industry / Q000379:methods; D004566:Electrodes; D000431:Ethanol / Q000737:chemistry; D006536:Heptanes / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D000432:Methanol / Q000737:chemistry; D008956:Models, Chemical; D011134:Polysaccharides / Q000737:chemistry*; D013237:Stereoisomerism; D013696:Temperature; D013997:Time Factors
chemical_list: D000097:Acetonitriles; D006536:Heptanes; D011134:Polysaccharides; D000431:Ethanol; D000432:Methanol; C032159:acetonitrile