A capillary electrophoresis method for the simultaneous determination of the enantiomeric purity and of impurities of the chiral calcimimetic drug cinacalcet hydrochloride has been developed following Quality by Design principles. The scouting phase was aimed to select the separation operative mode and to identify a suitable chiral selector. Among the tested cyclodextrins, (2-carboxyethyl)-beta-cyclodextrin and (2-hydroxypropyl)-gamma-cyclodextrin (HP gamma CyD) showed good chiral resolving capabilities. The selected separation system was solvent-modified capillary zone electrophoresis with the addition of HP gamma CyD and methanol. Voltage, buffer pH, methanol concentration and HP gamma CyD concentration were investigated as critical method parameters by a multivariate strategy. Critical method attributes were represented by enantioresolution and analysis time. A Box-Behnken Design allowed the contour plots to be drawn and quadratic and interaction effects to be highlighted. The Method Operable Design Region (MODR) was identified by applying Monte-Carlo simulations and corresponded to the multidimensional zone where both the critical method attributes fulfilled the requirements with a desired probability pi >= 90%. The working conditions, with the MODR limits, corresponded to the following: capillary length, 48.5 cm; temperature, 18 degrees C; voltage, 26 kV (26-27 kV); background electrolyte, 150 mM phosphate buffer pH 2.70 (2.60-2.80), 3.1 mM (3.0-3.5 mM) HP gamma CyD; 2.00% (0.00-8.40%) v/v methanol. Robustness testing was carried out by a Plackett-Burman matrix and finally a method control strategy was defined. The complete separation of the analytes was obtained in about 10 min. The method was validated following the International Council for Harmonisation guidelines and was applied for the analysis of a real sample of cinacalcet hydrochloride tablets. (C) 2018 Elsevier B.V. All rights reserved.
Chiral capillary zone electrophoresis in enantioseparation and analysis of cinacalcet impurities: Use of Quality by Design principles in method development
Giuffrida, A.;
2018-01-01
Abstract
A capillary electrophoresis method for the simultaneous determination of the enantiomeric purity and of impurities of the chiral calcimimetic drug cinacalcet hydrochloride has been developed following Quality by Design principles. The scouting phase was aimed to select the separation operative mode and to identify a suitable chiral selector. Among the tested cyclodextrins, (2-carboxyethyl)-beta-cyclodextrin and (2-hydroxypropyl)-gamma-cyclodextrin (HP gamma CyD) showed good chiral resolving capabilities. The selected separation system was solvent-modified capillary zone electrophoresis with the addition of HP gamma CyD and methanol. Voltage, buffer pH, methanol concentration and HP gamma CyD concentration were investigated as critical method parameters by a multivariate strategy. Critical method attributes were represented by enantioresolution and analysis time. A Box-Behnken Design allowed the contour plots to be drawn and quadratic and interaction effects to be highlighted. The Method Operable Design Region (MODR) was identified by applying Monte-Carlo simulations and corresponded to the multidimensional zone where both the critical method attributes fulfilled the requirements with a desired probability pi >= 90%. The working conditions, with the MODR limits, corresponded to the following: capillary length, 48.5 cm; temperature, 18 degrees C; voltage, 26 kV (26-27 kV); background electrolyte, 150 mM phosphate buffer pH 2.70 (2.60-2.80), 3.1 mM (3.0-3.5 mM) HP gamma CyD; 2.00% (0.00-8.40%) v/v methanol. Robustness testing was carried out by a Plackett-Burman matrix and finally a method control strategy was defined. The complete separation of the analytes was obtained in about 10 min. The method was validated following the International Council for Harmonisation guidelines and was applied for the analysis of a real sample of cinacalcet hydrochloride tablets. (C) 2018 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
