Quantification of Glycyrrhizin in Glycyrrhiza Glabra Extract by Validated HPTLC Densitometry

Abstract

Abstract Glycyrrhiza Glabra Linn (Family-Fabaceae) is active as an anti-allergic, anti-inflammatory, spasmolytic, mild laxative, antistress, antidepressive, antiulcer, liver protective, estrogenic, emmenagogue, and antidiabetic substance, and is widely used in the Indian system of medicine. The major bioactive constituent is glycyrrhizin. A simple HPTLC method has been developed to control the quality of raw as well as finished glycyrrhiza using glycyrrhizin as the bioactive marker. The solvent system was optimized to chloroformmethanolwater (65 + 36 + 7.5, v/v/v). Extract and standard were dissolved in 70 methanol and applied on a precoated TLC plate. After development, the plate was scanned at 254 nm to create a chromatogram, then the quantity of glycyrrhizin was determined in the extract. The method was validated in terms of specificity, linearity, precision, LOD, and LOQ. Linearity range was found to be 0.964.80 g per spot. The linearity relationship was described by the equation: Y 612.706 + 1.091X (with r 0.99904 and SD 2.52), where Y is the area under curve and X is the amount of glycyrrhizin (ng). The amount of glycyrrhizin found in the extract was 9.1. Thus, the method provides a rapid and cost-effective quality measure for Glycyrrhiza Glabra hydroalcoholic extract.