FOOD SCIENCE ›› 2010, Vol. 31 ›› Issue (7 ): 173-176.doi: 10.7506/spkx1002-6300-201007038

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Effect of Metal Ions on Gel-forming Characteristics of Peanut Protein Isolate

ZHONG Shi-rong,FENG Zhi-ping,WU Shi-ye   

  1. School of Biotechnology Engineering, Sichuan University of Science and Engineering, Zigong 643000, China
  • Received:2009-12-16 Online:2010-04-01 Published:2010-12-29
  • Contact: ZHONG Shi-rong E-mail:zhongsr@suse.edu.cn

Abstract:

Peanut protein isolate was prepared by the method of alkaline extraction followed by acid precipitation. Effects of metal ions such as NaCl, MgCl2, CaCl2 and CuSO4 at various concentrations on gel-forming characteristics of peanut protein isolate were explored under the conditions of 90 ℃, pH 9 and 14 g/100mL peanut protein solution. Results indicated that CaCl2 at the concentration of 0.06 mol/L was a good coagulatant for peanut protein isolate. Higher hardness, shorter gelatin time and thicker colloidal particles of peanut protein isolate were observed under this condition.

Key words: peanut protein, gel, metal ion

CLC Number: