Study on technology for obtaining quercetin from Linifolius Conyza by microwave-assisted extraction

Determination of quercetin from Linifolius Conyza by microwave-assisted extraction and absorption spectroscopy was reported. The effects of solvent concentration, microwave time, ratio of solution to solid and microwave-assisted extraction pressure were evaluated by single factor experiments. The extraction conditions of quercetin from Linifolius Conyza by microwave -assisted method were optimized: ethanol concentration is 70 %( V/ V); microwave time is 5 minutes; ratio of solution to solid is 45:1 and microwave-assisted extraction pressure is 500kPa microwave - assisted extraction and absorption spectroscopy was simple and accurate with good reproducibility.