Effects of Peeling and Sample types on Drying Time and Paeoniflorin Contents of Peony Root

작약근의 박피와 시료형태가 건조시간 및 Paeoniflorin 함량에 미치는 영향

  • Kim, Ki-Jae (Uisong Medicinal Plant Experiment Station, Kyongbuk Provincial ATA) ;
  • Park, Chun-Hong (Uisong Medicinal Plant Experiment Station, Kyongbuk Provincial ATA) ;
  • Park, So-Deuk (Uisong Medicinal Plant Experiment Station, Kyongbuk Provincial ATA) ;
  • Kim, Jae-Cheol (Uisong Medicinal Plant Experiment Station, Kyongbuk Provincial ATA) ;
  • Park, Kyeng-Sok (Uisong Medicinal Plant Experiment Station, Kyongbuk Provincial ATA)
  • 김기재 (경북농업기술원 의성약초시험장) ;
  • 박준홍 (경북농업기술원 의성약초시험장) ;
  • 박소득 (경북농업기술원 의성약초시험장) ;
  • 김재철 (경북농업기술원 의성약초시험장) ;
  • 박경석 (경북농업기술원 의성약초시험장)
  • Published : 2002.03.31

Abstract

Effect of pretreatment processing (peeling time, drying temperature, sample type) on the quality of hot air drying peony roots was investigated. Peony roots were peeled for 0, 10, 20, 30, 60, 90 and 120 minute in the peeling machine after water washing. Sample types were whole or cut (thickness of 3mm). Temperatures of hot air drying were 30, 40, 50 and $60^{\circ}C$ The level of water contents in dried sample was $14{\sim}15%$. Drying time was muth reduced as the peeling time, cutting sample types and higher temperature. Contents of paeoniflorin were maintained highest amount (3.48%) in the non-peeling cut sample dried at $30^{\circ}C$ and lowest amount (2.29%) in the 120min-peeling whole one dried at $60^{\circ}C$. Skin color of dried peony roots was heavily discolored in the sample of non-peeling whole type dried at $60^{\circ}C$ and the color was dark brown $({\Delta}E\;was\;46.1)$. When considering shortening of drying time, preservation of active compounds and maintenance of color, the best pretreatment method of drying in peony roots was non-peeling, cut type processing.

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