FOOD SCIENCE ›› 2005, Vol. 26 ›› Issue (9): 234-239.

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Study on the Extraction of Pigment from Purple Sweet Potato Powder by Microwave-assisted Technique

 XU  Zheng-Hong, GAO  Yan-Xiang, SHI  Su-Lan, LIU  Xuan   

  1. College of Food Science and Nutritional Engineering, China Agricultural University
  • Online:2005-09-15 Published:2011-09-20

Abstract: Anthocyanin was extracted by microwave-assisted technique from purple sweet potato powder. The effects of average microwave output power、microwave irradiation time、different solvents and their concentrations on the extraction yield were investigated, the parameters of extraction process were optimized through Response Surface Methodology (RSM) and average microwave output power was 700w(temperature 70℃), microwave irradiation time was 6.37min, liquid/solid ratio 15:1 and hydrochloride concentration was 0.3%.

Key words: microwave-assisted extraction, purple sweet potato powder, anthocyanin, Response Surface Methodol- ogy (RSM)