Conversion of 6-gingerol to 6-shogaol in ginger (Zingiber officinale) pulp and peel during subcritical water extraction

Min Jung Ko, Hwa Hyun Nam, Myong Soo Chung

Research output: Contribution to journalArticlepeer-review

62 Scopus citations


Subcritical water extraction is an eco-friendly method for the extraction of less polar compounds without the use of organic solvents. This study determined the extraction conditions that maximize the contents of 6-gingerol and 6-shogaol obtained from ginger pulp and peel. The highest yields of 6-gingerol (0.68 ± 0.08 mg/g), and 6-shogaol (0.39 ± 0.03 mg/g) were obtained from ginger pulp at the extraction conditions of 130 °C/25 min, and 190 °C/15 min. 6-Shogaol content increased with the increasing extraction temperature and extraction time due to the conversion of 6-gingerol to 6-shogaol by thermal cracking. The antioxidant activity of ginger extracts were increased depending on the increasing of 6-shogaol content.

Original languageEnglish
Pages (from-to)149-155
Number of pages7
JournalFood Chemistry
StatePublished - 1 Jan 2019

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education ( 2016R1D1A1B03930300 ), South Korea. This work was supported by Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET) through High Value-added Food Technology Development Program, funded by Ministry of Agriculture, Food and Rural Affairs (MAFRA) (315063-3), South Korea.

Publisher Copyright:
© 2018 Elsevier Ltd


  • 6-Gingerol
  • 6-Gingerol (PubChem CID: 442793)
  • 6-Shogaol
  • 6-Shogaol (PubChem CID: 5281794)
  • Conversion
  • Ginger peel
  • Ginger pulp
  • Subcritical water extraction
  • Trolox (PubChem CID: 40634)


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