食品科学

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热活化膨润土涂膜在芒果保鲜中的应用

刘 琨,陈 勇,黄煇荣   

  1. 广西大学化学化工学院,广西 南宁 530004
  • 出版日期:2013-09-25 发布日期:2013-09-27

Application of Thermoactivated Bentonite Coating for Mango Preservation

LIU Kun,CHEN Yong,HUANG Hui-rong   

  1. School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
  • Online:2013-09-25 Published:2013-09-27

摘要:

钙基膨润土分别经200℃和400℃高温焙烧活化,以液固比为15:1制得不同活化膨润土保鲜液。芒果果实经不同活化膨润土保鲜液涂膜处理后于26~28℃贮藏。在贮藏过程中分别测定芒果果实转黄指数、腐烂指数、质量损失率、果胶含量、可溶性糖含量、总酸含量、呼吸强度等芒果各项生理指标。结果表明,200℃活化膨润土能够更好地抑制芒果转黄和腐烂,减少水分散失,减缓果胶的降解,抑制呼吸高峰的出现,阻止糖的积累和酸的降解,与未活化膨润土以及400℃活化土相比,能够有效延缓芒果的后熟进程并达到保鲜的效果。

关键词: 膨润土, 活化, 涂膜, 芒果, 保鲜

Abstract:

Ca-based bentonite was roasted at 200 or 400 ℃ for thermal activation. After diluted with water at a liquid/
solid ratio of 15:1, suspensions of the activated and non-activated bentonite were coated onto the surface of mangoes. The
treated mangoes were stored at 26 to 28 ℃ and measured for yellowing index, decay index, weight loss rate, the contents
of protopectin, soluble sugar and total acid and respiration rate. The results showed that the 200 ℃ activated bentonite
significantly decreased skin yellowing, decay incidence, weight loss rate, and slowed down protopectin degradation in
mango. Meanwhile, the occurrence of the respiration peak was delayed, and sugar accumulation and acid degradation were
retarded. Compared with treatment with nothing or the 400 ℃ activated bentonite, the 200 ℃ activated bentonite was more
effective in delaying their post-harvest ripening and thus achieving the purpose of preservation.

Key words: bentonite, activation, coating, mango, preservation