Abstract
Two simple precise normal-phase (Method I) and reversed-phase (Method II) HPTLC/densitometry method have been developed for simultaneous determination of telmisartan and metoprolol succinate in bulk and in combined tablet formulation. Method I was developed with aluminium plates precoated with silica gel 60F254S, and toluene : propanol : methanol : triethylamine (8 : 1 : 1 : 0.5 v/v) was used as as mobile phase. Method II was carried out using aluminium coated with RP-18 silica gel 60 F254S HPTLC plates using methanol : water : triethylamine (6 : 4 : 0.5 v/v) as mobile phase. Both analyses were scanned with a densitometer at 242 nm. In Method I, good separation and resolution of drugs were achieved with values (telmisartan) and (metoprolol), while in Method II, telmisartan and metoprolol showed values and , respectively. These methods can be used in routine pharmaceutical analysis.
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