Application of Normal and Reversed-Phase TLC/Densitometry Methods for Determination of Naratriptan Hydrochloride in Tablet dosage form

Naratriptan Hydrochloride (NTPH) is used as antimigraine drugs. In the present investigations two simple, economical and precise, normal-phase High-Performance Thin-Layer Chromatography (Method A) and Reversed Phase High Performance Thin Layer Chromatography (Method B) have been established for determination of NTPH in bulk and in tablets. Method A and Method B were developed on aluminium plates precoated with silica gel 60F254 and RP-18 silica gel 60 F254 S as the stationary phase, respectively. Separation of NTPH was achieved using Chloroform: 2-propranol: triethylamine (8: 1.4: 0.6 v/v) in Method A and methanol: water: triethylamine (9: 0.6: 0.4 v/v) in Method B. Densitometry scanning were performed at 223 nm. Both methods were found to give compact spot for the NTPH at Rf 0.55 ± 0.02. Validation of Method A and Method B were performed as per as International Conference on Harmonization guidelines.