IMPROVEMENT OF QUERCETIN CONTENT OF ONION EXTRACT BY FAR INFRARED RAY DRYING PROCESS

摘要

PURPOSE: Onion with the improved content of quercetin, and a producing method thereof are provided to radiate far infrared rays to dried onion for improving the content of the quercetin. CONSTITUTION: A producing method of onion with the improved content of quercetin comprises a step of radiating far infrared rays at 80deg C to dried onion for 20~30minutes. The onion is used to obtain an onion extract with the improved content of the quercetin by extracting the onion with a solvent. The onion extract is for producing functional food.