title: Effect of system variables involved in packed column SFC of nevirapine as model analyte using response surface methodology: application to retention thermodynamics, solute transfer kinetic study and binary diffusion coefficient determination.
abstract: A multifactor optimization technique is successfully applied to study the effect of simultaneously varying the system variables on feasibility of nevirapine analysis by packed column supercritical fluid chromatography (PC-SFC). The optimal conditions were determined with the aid of the response surface methodology using 3(3) factorial designs. The method is based on methanol-modified carbon dioxide as the mobile phase at flow rate of 3.0 ml/min with elution through a JASCO Finepak SIL-5, [C18 (5-micron, 25 cm x 4.6 mm, i.d.)] column using photodiode array detection. The method has been successfully used to analyze commercial solid dosage form to assess the chromatographic performance of SFC system. The present work briefs the thermodynamic applications of PC-SFC with an emphasis on the results of nevirapine. The foremost of such applications is the determination of solute diffusion coefficient in supercritical mobile phase by Taylor-Aris peak broadening technique.
authors.affiliation: Department of Quality Assurance Techniques, Bharati Vidyapeeth Deemed University, Poona College of Pharmacy, Erandwane, Pune, Maharashtra State, India.
authors.forename: Neerej
authors.initials: N
authors.lastname: Kaul
authors.forename: Himani
authors.initials: H
authors.lastname: Agrawal
authors.forename: A R
authors.initials: AR
authors.lastname: Paradkar
authors.forename: K R
authors.initials: KR
authors.lastname: Mahadik
mesh_terms: D019380:Anti-HIV Agents / Q000737:chemistry / Q000302:isolation & purification; D055592:Biophysical Phenomena; D001703:Biophysics; D002138:Calibration; D002845:Chromatography; D002851:Chromatography, High Pressure Liquid; D025924:Chromatography, Supercritical Fluid / Q000379:methods*; D004058:Diffusion; D007700:Kinetics; D008956:Models, Chemical; D008962:Models, Theoretical; D019829:Nevirapine / Q000737:chemistry / Q000302:isolation & purification*; D011312:Pressure; D012044:Regression Analysis; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013053:Spectrophotometry; D013696:Temperature; D013816:Thermodynamics; D014466:Ultraviolet Rays
chemical_list: D019380:Anti-HIV Agents; D019829:Nevirapine