@article {1093, title = {Quantitative Estimation of Immunomodulatory Flavonoid Quercetin by HPTLC in Different Leafy Vegetables Available in West Bengal}, journal = {Pharmacognosy Research}, volume = {14}, year = {2022}, month = {October 2022}, pages = {423-428}, type = {Original Article}, chapter = {423}, abstract = {

Introduction: Leafy vegetables are commonly consumed medicinal plants used in various metabolic and infectious diseases. Additionally, their antiviral, antioxidant, anticancer, and antihypertensive activities have been reported in the literature. Objectives: To determine the quantity of immunomodulatory flavonoid, quercetin in different types of leafy vegetables available in West Bengal by using a simple validated HPTLC method. Materials and Methods: The chromatographic analysis was performed by using aluminium-backed silica gel 60 F254 plates with Toluene{\textendash}Ethyl acetate{\textendash}Formic acid 5:4:0.2 (\%v/v) as the mobile phase. The method was validated according to the ICH guidelines. Results: The total flavonoid content (TFC) in the four leafy vegetables studied varied between 58.10 to 12.28 mg QE/g. Well-separated and compact spots (Rf) of quercetin (0.55{\textpm}0.03) were detected. The regression equation obtained was y = 0.0011x - 0.0569, with a correlation coefficient (R{\texttwosuperior}) of 0.9939. The linearity range (μg/spot) was 60-160. The LOD/LOQ (ng/spot) was 6.09/18.47. Murraya koenigii (0.1992{\textpm}0.037 \%w/w) contained the maximum amount of quercetin compared to Ipomoea aquatic (0.1501{\textpm}0.039\%w/w), Coriandrum sativum (0.1430{\textpm}0.061\%w/w) and Trigonella foenum- graecum (0.1201{\textpm}0.055\%w/w) in methanolic extract. Conclusion: This study revealed that the validated HPTLC method was simple, accurate and sensitive for separating and quantifying quercetin in different leaf vegetables. Quercetin content was highest in Murraya koenigii (0.1992{\textpm}0.037 \%w/w), and least in Trigonella foenum-graecum (0.1201{\textpm}0.055 \%w/w). The developed method might be used further in standardizing and quality control of secondary metabolites in herbal formulations

}, keywords = {Flavonoid, HPTLC, Leafy vegetables, Quercetin}, doi = {10.5530/pres.14.4.62}, author = {Tushar Adhikari and Prerona Saha} }