title: High-performance thin-layer chromatographic determination of diltiazem hydrochloride as bulk drug and in pharmaceutical preparations.
abstract: A simple, rapid, selective and precise high-performance thin-layer chromatographic method for the analysis of diltiazem hydrochloride both as a bulk drug and in pharmaceuticals is reported. The mobile phase composition was ethyl acetate-methanol-strong ammonia solution (80:10:10, v/v). Densitometric analysis of diltiazem hydrochloride was carried out at 238 nm. The calibration curve of diltiazem hydrochloride in distilled water was linear in the range 40-400 ng. The mean value of correlation coefficient, slope and intercept were 0.997+/-0.0008, 0.0617+/-0.0012 and 7.16+/-0.2562, respectively. The limits of detection and quantitation were 20 ng and 40 ng, respectively. The recovery of diltiazem hydrochloride was about 99.5%. The method was utilized to analyse diltiazem hydrochloride from conventional and sustained release tablets in the presence of commonly used excipients.
authors.affiliation: University Department of Chemical Technology (Autonomous), University of Mumbai, Matunga, India.
authors.forename: P V
authors.initials: PV
authors.lastname: Devarajan
authors.forename: V V
authors.initials: VV
authors.lastname: Dhavse
mesh_terms: D002121:Calcium Channel Blockers / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D002138:Calibration; D002855:Chromatography, Thin Layer / Q000379:methods*; D002940:Circadian Rhythm; D004110:Diltiazem / Q000032:analysis* / Q000737:chemistry / Q000378:metabolism; D004355:Drug Stability; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D002121:Calcium Channel Blockers; D004110:Diltiazem