In order to investigate the differences in quality and aroma of pericarpium citri reticulatae (PCR) in different storage methods, 0-9 years PCR in standard dry storage and natural aging storage conditions were chosen as the research objects to compare the differences in color difference, carotenoids, total phenols, total flavonoids, antioxidant activity, flavonoids and volatile components by UV spectrophotometry, HPLC, and headspace solid-phase microextraction-gas chromatography-mass spectrometry. The results showed that compared with natural aging PCR, the color difference of standard dry storage PCR had a smaller trend, and the retention effect of carotenoids was better;total phenols, total flavonoids, antioxidant activity, didymin, nobiletin and tangeretin showed an increasing trend during the aging process, while the content of hesperidin was decreased.The rate of increase in the characteristic components of PCR was higher and the rate of decrease was lower under standard dry storage conditions.A total of 55 common aroma components were detected in the two storage methods, mainly alkenes, alcohols, aldehydes and esters, and the relative contents of alcohols, aldehydes and ketones in the naturally aged PCR were significantly higher than that of the standard dry storage PCR, and the partial least squares discriminant analysis could better distinguish the two kinds of PCR;among them, 13 kinds of different aroma substances could be used for the differentiation of the storage mode of PCR.The present study analyzed and compared the differences between the two types of PCR stored in different ways to provide reference for elucidating the quality and aroma characteristics of the two types of PCR.
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