A Simple and Sensitive HPTLC Method for Simultaneous Analysis of Domperidone and Paracetamol in Tablet Dosage Forms

A simple, precise, rapid, selective, and economic high-performance thin-layer chromatographic (HPTLC) method has been established for simultaneous analysis of domperidone (DMP) and paracetamol (PAR) in tablet dosage forms. The chromatographic separation was performed on precoated silica gel 60 GF254 plates with acetone- toluene-methanol 4:4:2 (v/v) as mobile phase. The plates were developed to a distance of 8.0 cm at ambient temperature. The developed plates were scanned and quantified at their single wavelength of maximum absorption at approximately 285 and 248 nm for dom-peridone and paracetamol, respectively. Experimental conditions such as band size, chamber saturation time, migration of solvent front, slit width, etc. were critically studied and the optimum conditions were selected. The drugs were satisfactorily resolved with RF 0.52 ± 0.02 for domperidone and 0.74 ± 0.02 for paracetamol. The method was validated for linearity, accuracy, precision, and specificity. The calibration plot was linear between 16–48 ng per band for DMP and 800-2400 ng per band for PAR. The limits of detection and quantification for DMP were 0.022 and 0.186 ng per band, respectively; for PAR they were 0.307 and 0.931 ng per band. This HPTLC procedure is economic, sensitive, and less time consuming than other chromatographic procedures. It is a user-friendly and important tool for analysis of combined tablet dosage forms.