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Comparison on the Extract Content by Different Processing Method in Peony (Paeonia lactiflora Pall.) Root  

Choung, Myoung-Gun (Dept. of Phamacognosy Material Development, Samcheok National University)
An, Young-Nam (College of Natural Resources, Yeungnam University)
Kang, Kwang-Hee (College of Natural Resources, Yeungnam University)
Cho, Young-Son (National Yeongnam Agricultural Experiment Station, RDA)
Kim, Jae-Hyun (National Yeongnam Agricultural Experiment Station, RDA)
Publication Information
Korean Journal of Medicinal Crop Science / v.11, no.3, 2003 , pp. 201-206 More about this Journal
Abstract
This experiment was conducted to establish the standard of quality evaluation in peony root (Paeonia lactiflora Pall.) cultivated in Korea. The contents of extract and changes of extract pH in peony root with different root ages, cultivars and drying method were investigated. The contents of extract and changes of extract pH in peony root with the removed and the unremoved cork layer showed no difference among different root ages. On the other hand, the contents of extract in the root with the unremoved cork layer which was two- to four-year-old, were higher by 3.7 to 9.2% than those in the root with removed cork layer. This suggests that cork layer might be a good source of extracts. The contents of extract in root of Youngchonjakyak in both the removed and the unremoved cork layer were 36% and 30%, respectively and were higher than of Euisungjakyak and Jomjakyak, but the extract pH was not significantly different among three cultivars which were four-year-old. It showed that the contents of extract and the changes of extract pH in peony root with the removed and the unremoved cork layer of Euisungjakyak, which being four-year-old, showed clear difference at various drying methods. Among the different drying methods, it showed that the contents of extract of that with unremoved cork layer in the room temperature drying method was 32.8%, and that of root with the removed cork layer in the $80^{\circ}C$ hot water treatment drying method was 28.1% which were the highest values, respectively. The pH of extract in freeze drying was the highest (about 5.1), and the $80^{\circ}C$ hot water treatment drying showed the lowest (about 3.7).
Keywords
peony root; Paeonia lactiflora Pall.; extract content; extract pH;
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Times Cited By KSCI : 2  (Citation Analysis)
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