研究了不同浓度L-半胱氨酸、柠檬酸、抗坏血酸和氯化钙抑制鲜切梨褐变的效果。在单因素试验基础上,采用4因素3水平正交试验,得到一种可替代亚硫酸盐的新型复合护色保鲜液,其最佳浓度组合为:1%氯化钙+0.5%抗坏血酸+0.5%L-半胱氨酸。经比较,最佳护色液在抑制褐变、丙二醛量升高,保持VC含量等方面均优于亚硫酸氢钠。

Effects of different concentrations of L-cys,citric acid,ascorbic acid,calcium and chloride on inhibiting browning degree of fresh-cut pears were investigated.Based on the single-factor test,four-factor three-level orthogonal experiment was conducted to optimize the formula which could replace sodium bisulfite.The optimum combination treatment was 1% calcium chlorid + 0.5% ascorbic acid +0.5% L-Cys.Comparative tests showed that the optimal formula is better than sodium bisulfit in the areas of inhibiting browning,MDA content and keep the Vc content.