Herbal Formula Science (대한한의학방제학회지)

The Korean Medicine Society for the Herbal Formula Study (대한한의학방제학회)
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Extract changes of Caulis Lonicerae Japonicae according to with or without Iron

인동(忍冬)의 기철(忌鐵) 및 반철(伴鐵) 추출시(抽出時) 추출물(抽出物)의 변화(變化)

  • Received : 2020.08.07
  • Accepted : 2020.08.25
  • Published : 2020.08.31
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Abstract

Objectives : In case of herbs decoction, the ceramic or earthware pots was recommended, but not the metals, particularly iron or aluminum, which could cause unknown chemical reactions. In Korean Medical classics, it has been known that some herbs including Caulis Lonicerae Japonicae (CL) were not recommended to boil with iron pot. This study investigates the physical changes of extracts of CL with or without iron. Methods : CL was decocted with reflux cooling extraction system to prevent evaporation and volatilization. Content of polyphenol was detected by Folin-Denis method and the levels of loganin and chlorogenic acid were evaluated by UPLC. Results : The color of extract with glass beads (GB) is yellowish brown, and the iron beads (IB) is blackish brown. Polyphenol and chlorogenic acid levels were reduced in IB extracts. Conclusions : The color of extract was change to blackish brown, and polyphenol and chlorogenic acid levels were reduced in CL extract with iron. Therefore, iron pots is not suitable for CL extraction.

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