title: Box-Behnken supported validation of stability-indicating high performance thin-layer chromatography (HPTLC) method: An application in degradation kinetic profiling of ropinirole.
abstract: Stability-indicating high-performance thin-layer chromatographic (HPTLC) method for the analysis of ropinirole HCl was developed and validated as per the ICH guidelines. The method employed the mobile phase and toluene-ethyl acetate-6 M ammonia solution (5:6:0.5, v/v/v) was optimized with the help of a design expert. Densitometric analysis of ropinirole HCl was carried out in the absorbance mode at 250 and 254 nm. Compact spots for ropinirole HCl were found at R f value of 0.58 ± 0.02. The linear regression analysis data for the calibration plots showed R (2) = 0.9989 ± 0.0053 with a concentration range of 100-3000 ng spot(-1). The method was validated for precision, accuracy, ruggedness, robustness, specificity, recovery, limit of detection (LOD) and limit of quantitation (LOQ). The LOD and LOQ were 12.95 and 39.25 ng spot(-1) respectively. Drug was subjected to acidic, alkaline, oxidative, dry heat, wet heat and photo degradation stress. All the peaks of degradation products were well resolved from the standard drug peak with significant difference of R f. The acidic and alkaline stress degradation kinetics of ropinirole, were found to be in first order, showing high stability (t 1/2, 146.37 h(-1); t 0.9, 39.11 h(-1)) in the acidic medium and low stability (t 1/2, 97.67 h(-1); t 0.9, 14.87 h(-1)) in the alkaline environment.
authors: Department of Pharmaceutics, Faculty of Pharmacy, Hamdard University, Hamdard Nagar, New Delhi 110 062, India.
authors: Gulam
authors: G
authors: Mustafa
authors: Alka
authors: A
authors: Ahuja
authors: Sanjula
authors: S
authors: Baboota
authors: Javed
authors: J
authors: Ali
keywords: Degradation kinetics; Design-expert optimization; HPTLC; Ropinirole; Stability-indicating; Validation
references: Clin Pharmacokinet. 2000 Oct;39(4):243-54
references: 11069211
references: Drugs. 2000 Jul;60(1):115-37
references: 10929932
references: J Pharm Biomed Anal. 2007 Mar 12;43(4):1587-93
references: 17207602
references: Xenobiotica. 1999 Mar;29(3):311-25
references: 10219970
references: Clin Pharmacokinet. 2006;45(2):109-36
references: 16485914
references: Mayo Clin Proc. 2006 Jan;81(1):17-27
references: 16438474
references: J Chromatogr. 1989 Jul 14;474(1):123-38
references: 2570079
references: J Chromatogr B Biomed Sci Appl. 1999 Sep 24;732(2):437-44
references: 10517366
references: Analyst. 1997 Oct;122(10):1007-13
references: 9463947
references: J Pharm Biomed Anal. 2006 Mar 18;40(5):1202-8
references: 16289706
references: J Chromatogr. 1985 Nov 29;345(1):203-8
references: 4086584