Abstract
Background: Quercetin was determined in bioactive fractions of Ocimum gratissimum, Butea monosperma, Bauhinia variegate and polyherbal hepatoprotective formulation by HPTLC method. Methods: Polyherbal hepatoprotective formulation was developed by using five bioactive fractionated extracts of three plants namely Butea monosperma, Bauhinia variegate and O. gratissimum. All three plants contain quercetin. Chromatographic separation was performed on aluminium foil plates coated with 200 μm silica gel 60F254 Linear ascending development with toluene:ethyl acetate:formic acid, 5:4:0.1 (v/v/v) was performed at room temperature (25 ± 2°C) in a twin-trough glass chamber saturated with mobile phase vapor. Compact bands (Rf=0.38) were obtained for quercetin. Spectro densitometric scanning was performed in fluorescence mode at 380 nm. The method was validated for precision, recovery, specificity, detection and quantification limits. Results: Linear regression analysis of the calibration plots showed a good linear relationship (R²=0.9843 ± 0.0001) between peak area and concentration in the range 0.5-2.5 μg/band, respectively. The limits of detection and quantification were 0.089 and 0.26 μ/band. The recovery of the method was 97.33-99.11%. Conclusion: The above method was a rapid and cost effective quality-control tool for routine analysis of quercetin in herbal extracts and in pharmaceutical dosage form.
Highlights
Nature still obliges as the man’s primary source for the cure of his ailments
Polyherbal hepatoprotective tablet was prepared by using fractions obtained from alcoholic extracts of Butea monosperma, Bauhinia variegata stem bark and O. gratissimum leaves (Figure 1)
The chemical tests analysis demonstrated that AcO fraction of Butea monosperma, EtOAc fraction and n-BtOH fraction of Bauhinia variegata, DCM and EtOAc fractions of Ocimum gratissimum were rich in phenolic compounds
Summary
Nature still obliges as the man’s primary source for the cure of his ailments. Research in preventive medicine showed the importance of functional nutrition in reducing the risk factor of certain chronic diseases. Innate defense system of the human body may be insufficient for the damage caused by continued oxidative stress [1]. Quercetin and other flavonoids, have the structure to act as powerful antioxidants, and have often proven so in vitro. Quercetin, being a major constituent of the flavonoid intake, could be a key in fighting several chronic degenerative diseases [2]. Recently there has been an upsurge of interest in natural products as antioxidants, as they inhibit the free radical reactions and protect human body from various diseases, such as cancer and diabetes. Recent studies showed that a number of plant products including polyphenolic substances (e.g., gallocatechins, delphinidin, cyanidin, gallic acid, ellagic acid, pelargonidin and sitosterol) and various plants or herbal extracts exert potent antioxidant actions, which are very well known for their healing powers [4]. Quercetin was determined in bioactive fractions of Ocimum gratissimum, Butea monosperma, Bauhinia variegate and polyherbal hepatoprotective formulation by HPTLC method
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