Wuhan University Journal of Natural Sciences

, Volume 23, Issue 1, pp 63–69 | Cite as

Optimization of extraction of antioxidants from turmeric (Curcuma longa L.) using response surface methodology

  • Caiqin Liu
  • Weiqing Chen
  • Nan Wang
  • Jianchang Jin
Physics and Biology


Turmeric is a spice widely used to enhance the taste and color of certain meats. We investigated the antioxidant capacities of turmeric ethanol soaking extracts by utilizing the scavenging properties of hydroxyl radical and 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical. The results showed that the optimum extraction parameters were: extraction time 4 h, sample-solvent ratio 1:84.12, solvent 72.34% ethanol solution, and water bath temperature 81.3 ℃. The optimum ethanol soaking extraction parameters were: extraction time 4 h, sample-solvent ratio 1:90.74, solvent 80.46% ethanol solution, water bath temperature 88.2 ℃. With these parameters, the hydroxyl radical scavenging rate and the DPPH free radical clearance of crude extracts from turmeric can reach about 93.78% and 40.69%, respectively. These results indicate that ethanol soaking extraction may be a useful method for extracting antioxidants from turmeric.


turmeric ethanol soaking extraction antioxidant activity hydroxyl radical scavenging capacity 1,1-diphenyl-2- picrylhydrazyl (DPPH) scavenging capacity 

CLC number

R 284.2 


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Copyright information

© Wuhan University and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Caiqin Liu
    • 1
  • Weiqing Chen
    • 1
  • Nan Wang
    • 1
  • Jianchang Jin
    • 1
  1. 1.College of Biology and Environment EngineeringZhejiang Shuren UniversityZhejiangChina

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