摘要
以紫米花色苷为原料,研究光辐照度、光波长范围、溶氧量及金属离子、辅色素对花色苷溶液稳定性的影响。结果表明:光辐照度与紫米花色苷保存率间呈显著的负量效关系,富含花色苷的产品应避免在强光下贮藏,而利用强光进行花色苷相关的破坏性加速实验则简便高效。紫外光和可见光都对花色苷有破坏作用,蓝光(450~490 nm)破坏作用最强,可见光的波长范围越小越有利于花色苷保存。在室内自然光照条件下,降低溶氧量是维持花色苷稳定的关键。Zn^2+等5种离子、绿原酸和没食子酸对花色苷有保护作用。入射光波长范围700~1000 nm,控制溶氧量为0.2 mg/L,添加1 mmol/L的Zn^2+及摩尔比为1∶15的没食子酸,可以在保持包装材料可透视的情况下,使花色苷保存率达到91.12%,比对照组提高28.43%。
Using purple rice anthocyanins as raw materials,the effects of light irradiance,light wavelength range,dissolved oxygen,metal ions and co-pigments on the stability of anthocyanins solution in storage environment were studied. The results showed that there was a significant negative dose-response relationship between the light irradiance and the retention rate of purple rice anthocyanins,and the products rich in anthocyanins should not be stored under strong light. The destructive acceleration experiments related to anthocyanins with strong light were simple and efficient. Both ultraviolet and visible light had destructive effects on anthocyanins,and blue light(450~490 nm)had the most destructive effect. The smaller the wavelength range of visible light incidence,the better the anthocyanins preservation. Reducing dissolved oxygen was the key factor to maintain anthocyanins stability under indoor natural light conditions. Five kinds of metal ions of Zn^2+,chlorogenic acid and gallic acid had protective and complementary pigment effects on anthocyanins. The wavelength of incident light ranged from 700 to 1000 nm,the dissolved oxygen contents was controlled at 0.2 mg/L,1 mmol/L of Zn^2+ and gallic acid with a pigment/co-pigment ratio of 1∶15 were added,and the anthocyanins retention rate reached 91.12%,28.43% higher than that of the control group,while the packaging materials could be kept perspective.
作者
伍怡斐
钟锦耀
郑经绍
丁少云
梁丽月
黄苇
WU Yi-fei;ZHONG Jin-yao;ZHENG Jing-shao;DING Shao-yun;LIANG Li-yue;HUANG Wei(College of Food,South China Agricultural University,Guangzhou 510642,China;College of Electronic Engineering,South China Agricultural University,Guangzhou 510642,China;Xinxing Weifeng Agricultural Science and Technology Co.,Ltd.,Xinxing 527400,China)
出处
《食品工业科技》
CAS
北大核心
2020年第16期47-53,共7页
Science and Technology of Food Industry
基金
紫米深加工技术研究及新产品开发(h2017179)。
关键词
紫米
花色苷
光
氧
金属离子
辅色素
purple rice
anthocyanins
light
oxygen
metal ions
co-pigments
