DETERMINATION OF QUERCETIN BY HPTLC IN TAGETES ERECTUS EXTRACT

Abstract

Medicinal plants are good source for treating various human diseases and they play a vital role in our day to day life. It has been observed that they are the best source of active secondary metabolites which are beneficial to mankind. Taggetus erectus Linn (Compositae), commonly known as garden marigold is an aromatic annual herb, which is used in Traditional System of Medicine to treat various diseases like anti-inflammatory, antitumour, antispasmodic. The reported constituents are flavonoids, glycosides and saponins. From literature it was found that the quantification work was not carried out. It is considered to contain Quercetin, which was confirmed by TLC and qualitative test. Thus it was quantified using HPTLC, a sensitive method for development of marker compounds. The method was carried out on precoated TLC precoated aluminum plates with silica gel 60 GF as stationary phase using solvent system as chloroform: methanol (9: 1) with Rf value of 0.43. Quantitative analysis was carried out in the absorbance at 366 nm. The linearity regression for the calibration showed r = 0.6548 and 0.999 with respect to height and area in a range of 0.5-5.0 g per spot. Thus HPTLC method provides a faster and cost effective quality control for the routine analysis of Quercetin in extracts containing Tagetes erectus. Thus the method developed can be used for routine analysis of marker compounds in crude drugs as well as in herbal formulations as an ingredient.