title: Optimising reversed-phase liquid chromatographic separation of an acidic mixture on a monolithic stationary phase with the aid of response surface methodology and experimental design.
abstract: An optimization strategy for the separation of an acidic mixture by employing a monolithic stationary phase is presented, with the aid of experimental design and response surface methodology (RSM). An orthogonal array design (OAD) OA(16) (2(15)) was used to choose the significant parameters for the optimization. The significant factors were optimized by using a central composite design (CCD) and the quadratic models between the dependent and the independent parameters were built. The mathematical models were tested on a number of simulated data set and had a coefficient of R(2) > 0.97 (n = 16). On applying the optimization strategy, the factor effects were visualized as three-dimensional (3D) response surfaces and contour plots. The optimal condition was achieved in less than 40 min by using the monolithic packing with the mobile phase of methanol/20 mM phosphate buffer pH 2.7 (25.5/74.5, v/v). The method showed good agreement between the experimental data and predictive value throughout the studied parameter space and were suitable for optimization studies on the monolithic stationary phase for acidic compounds.
authors.affiliation: Institute of Pharmaceutical Innovation, School of Life Science, University of Bradford, Bradford BD7 1DP, UK.
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
authors.forename: M
authors.initials: M
authors.lastname: Harrison
authors.forename: B J
authors.initials: BJ
authors.lastname: Clark
mesh_terms: D000143:Acids / Q000302:isolation & purification*; D002264:Carboxylic Acids / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D015999:Multivariate Analysis; D004364:Pharmaceutical Preparations / Q000302:isolation & purification*; D012984:Software; D013453:Sulfonylurea Compounds / Q000302:isolation & purification
chemical_list: D000143:Acids; D002264:Carboxylic Acids; D004364:Pharmaceutical Preparations; D013453:Sulfonylurea Compounds