Background: Sancho oil extracted from Zanthoxylum schinifolium (Siebold & Zucc) is a useful edible oil that has been in use for a long time, but it is known to be susceptible to rancidity. Sancho oil purification can remove impurities to prevent rancidity. This study was performed in order to improve the quality of sancho oil and enhance its availability throughout the purification process. Methods and Results: Sancho oil extracted in Hadong, Korea was refined via the degumming and deoxygenation processes, following which we examined the changes in the polyphenol content, fatty acid content and antioxidant activity of the oil. Acetic acid was effective for deoxygenation of sancho oil and 2 N NaOH was effective for its deoxidation. The polyphenol content and antioxidant activity were reduced by the purification process. Saturated fatty acids contents did not vary with the degumming and deoxygenation processes, however the content of unsaturated fatty acids were slightly reduced. Conclusions: This study suggests that the process of sancho oil purification used in this study will contribute to the increased use and storage of sancho oil.

INTRODUCTION
 MATERIALS AND METHODS
  1. Materials
  2. Determination of degumming effect
  3. Determination of deoxygenation effect
  4. Analysis of polyphenol content in purified sancho oil
  5. Analysis of the fatty acid content in purified sanchooil
  6. Analysis of antioxidant activity in purified sanchooil
  7. Statistical analysis
 RESULTS
  1. Density and crude fatty acids content ofunpurified sancho oil
  2. Degumming efficiency using phosphoric acid andacetic acid
  3. Deoxygenation efficiency according to the amountof NaOH
  4. Polyphenol content change during the purificationprocess
  5. Antioxidant activity in the purification process
  6. Change of fatty acid content according to theNaOH treatment
  7. Change of fatty acid content based on thepurification process
 RESULTS AND DISCUSSION
 REFERENCES

• 강승미(경상남도산림환경연구원, Gyeongsangnamdo Forest Environment Research Institute) | Seung Mi Kang
• 김학곤(경상대학교 환경산림과학부, Division of Environmental Forest Science, Gyeongsang National University) | Hak Gon Kim
• 양우형(경상대학교 환경산림과학부, Division of Environmental Forest Science, Gyeongsang National University) | Woo Hyeong Yang
• 용성현(경상대학교 환경산림과학부, Division of Environmental Forest Science, Gyeongsang National University) | Seong Hyeon Yong
• 박동진(경상대학교 환경산림과학부, Division of Environmental Forest Science, Gyeongsang National University) | Dong Jin Park
• 박준호(경상남도산림환경연구원, Gyeongsangnamdo Forest Environment Research Institute) | Jun Ho Park
• Ettagbor Hans Enukwa(경상대학교 환경산림과학부, Division of Environmental Forest Science, Gyeongsang National University)
• 최명석(경상대학교 환경산림과학부, Division of Environmental Forest Science, Gyeongsang National University) | Myung Suk Choi Corresponding author