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Copigmentation Effect of Organic Acids on Purple Sweet Potato Anthocyanins

WANG Meng, LI Xiao-ding*, LIU Shuo, ZHU Shao-hua, JIANG Hong   

  1. Key Laboratory of Environment Correlative Dietology, Ministry of Education, College of Food Science and Technology,
    Huazhong Agricultural University, Wuhan 430070, China
  • Published:2014-12-15

Abstract:

The copigmentation is an effective way to enhance the color of anthocyanins. Copigmentation effects of citric
acid, DL-malic acid, tartaric acid, caffeic acid and ferulic acid on purple sweet potato anthocyanins were studied. Results
showed that these five organic acids increased the absorption value of purple sweet potato anthocyanins, but did not change
the anthocyanin composition. The half-life (15.3 h) was increased by citric acid, DL-malic acid and tartaric acid to 19.1,
19.0 and 16.9 h at 90 ℃, but reduced by caffeic acid and ferulic acid to 1.8 and 1.6 h, respectively, indicating an unfavorable
effect on the thermal stability of purple sweet potato anthocyanins.

Key words: purple sweet potato anthocyanins, organic acid, copigmentation, thermal stability

CLC Number: