文档介绍：※包装贮运食品科学 2012, , 309
钙基及钠基膨润土涂膜对芒果保鲜效果的研究
刘 琨,王雪玲,陈 勇
(广西大学化学化工学院,广西南宁 530004)
摘 要:以桂七芒果为试验材料,用钙基及钠基膨润土进行涂膜处理后在室温下(28~33℃)贮藏,对贮藏过程中发
病指数、质量损失率、呼吸强度、可溶糖、可滴定酸、可溶性固形物、细胞膜透性、原果胶等物理、化学及生理指
标进行测定。结果表明:经涂膜后可以明显降低芒果发病情况和失水率,抑制呼吸强度、可溶糖和可溶性固形物高
峰的出现,降低了可滴定酸的下降程度,延缓了果胶的降解速度,较好的保持了细胞膜的功能活性。钠基膨润土涂
膜处理的保鲜效果好于钙基膨润土。
关键词:钙基膨润土;钠基膨润土;芒果;保鲜
Fresh-Keeping Effect of Coating with Calcium Bentonite or Sodium Bentonite on Mango at Ambient Temperature
LIU Kun,WANG Xue-ling,CHEN Yong
(School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China)
Abstract:“Guiqi” mangoes were coated with calcium bentonite or sodium bentonite and stored at ambient temperature
(28–33 ℃). Physicochemical and physiological indexes were measured during the storage, including decay index, weight
loss rate, respiration intensity, soluble sugar content, titritable acidity, soluble solids, membrane permeability, protopectin
and soluble pectin. The results show both calcium bentonite and sodium bentonite could significantly decrease decay index
and water loss, restrain the appearance of peak values of respiration intensity, soluble sugar content and soluble solids
content, retard the decrease of titritable acidity, slow down the degradation speed of pectin, and maintain cell membrane
functionality well. Furthermore, sodium bentonite was more ef