Avaleha is a traditional Ayurvedic oral herbal formulation consisting of five herbs, Vasaka (Adhatoda vasica Nees.), Pippali (Piper longum Linn.), Sugar, Ghee and Honey. It is available as a popular proprietary, from most manufacturers of ayurvedic drugs. A selective, precise and accurate High Performance Thin Layer Chromatography (HPTLC) method has been developed for the simultaneous quantification of Vasicine and Piperine in avaleha as well as its bulk drug. The method employed TLC aluminum plate precoated with silica gel 60 F254 as a stationary phase. The solvent system consists of Dioxane: Toluene: Ethyl acetate: Methanol: Ammonia (2.5:2:1:1:0.3 % v/v). This system was found to give compact spot for Piperin and Vasicine. Densiometric analysis was carried out in the absorbance mode at 285 nm. The linear regression analysis data for the calibration plot showed good linear relation with r = 0.992 and 0.993 with respect to peak area for Vasicine and Piperine respectively, in concentration range 2-10 µg/spot. The method was validated for precision, recovery, Limit of Detection and Limit of Quantification. The proposed HPTLC method was found to be simple, precised and accurate and can be used for the quality control of the raw materials as well as formulations.
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