摘要
在单因素试验的基础上,通过正交试验法优化苦水玫瑰花红色素的提取条件,并对其稳定性进行研究。结果表明,苦水玫瑰花红色素的最佳提取条件为:提取剂选用80%的乙醇,pH为2,料液比1∶60(g/mL),浸提时间60 min;苦水玫瑰花红色素在pH<6的酸性条件下较稳定,在碱性介质中极不稳定,在70℃以下较稳定,但对光较敏感,食品添加剂蔗糖和VC对其稳定性影响不大(色素吸光值变化幅度在10%以内)。该色素对还原剂Na2S2O3有一定的耐受能力,而对氧化剂H2O2的耐受性较弱,金属离子Na+、Al3+、K+、Ca2+对色素的稳定性无明显影响,而Fe2+和Fe3+对该色素的稳定性影响较大。
On the basis of single factor experiment,the orthogonal experiment was carried out to optimize the extraction conditions of red pigment from Kushui rose,and the stability of pigment was investigated.Results showed that,the optimum red pigment extraction process from Kushui rose were as follow:alcohol concentration 80%,pH 2,solid-to-liquid ratio 1∶60(g/mL),and extraction time 60 min.The Kushui rose red pigment was stable when pH<6,but extremely unstable in alkaline media,stable at 70℃,but sensitive to light,and no obvious effect was found when adding food additives such as sucrose and VC(the change of pigment absorbance was within 10%).The pigment also showed certain tolerance to reductant Na2 S2 O3,but weak tolerance to oxidant H2O2.Metal ion Na+,Al3+,K+and Ca2+had no obvious effect on the stability of pigment,while Fe2+and Fe3+had a great influence on the stability.
作者
巩慧玲
徐进
田泽
陈巧巧
鲍婧婷
袁惠君
GONG Hui-ling;XU Jin;TIAN Ze;CHEN Qiao-qiao;BAO Jing-ting;YUAN Hui-jun(College of Life Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《保鲜与加工》
CAS
北大核心
2019年第4期112-118,共7页
Storage and Process
基金
兰州市科技计划项目(2011-1-35)
关键词
苦水玫瑰
色素
提取
稳定性
Kushui rose
pigment
extract
stability
