青稞红曲色素稳定性影响因素的分析  

Analysis of the factors influencing the stability of highland barley Monascus pigment

作　　者：陈发贵 刘敏 熊燕 戚珊珊 胡久平 赵辉 

机构地区：[1]青藏高原微生物国家地方联合工程研究中心,拉萨850000 [2]西藏月王生物技术有限公司,拉萨850000

出　　处：《食品科技》2016年第2期300-303,共4页Food Science and Technology

基　　金：国家科技支撑计划课题项目(2012BAD33B06);科技型中小企业技术创新基金项目(12C26215406517)

摘　　要：分析青稞红曲色素稳定性的因素,寻找到青稞红曲色素的特征,以便于指导生产和应用。用紫外可见分光光度计在505 nm波长处测定青稞红曲色素溶液吸光度的变化,来判断色价改变情况。青稞红曲色素水溶液日光直射0.5 h即可使色价保存率降低到66.94%;日光灯处理时光照强度越高,色价损失越明显;低于60℃时热稳定性较高,短时间高温环境对色价损失影响不大,超过1h的高温处理会对色价保存率有明显的影响;青稞红曲色素水溶液在pH5至pH9基本上趋于稳定;Cu^(2+)、Fe^(3+)加入后对青稞红曲色素水溶液稳定性影响明显,其他离子无明显影响。加工、贮藏过程中青稞红曲应当避免日光照射、高温、过酸过碱和Cu^(2+)、Fe^(3+)存在的环境。Objective：The stabilities of highland barley Monascus pigment was studied to find the feature of the barley Monascus pigment and to guide the production application.Methods：The effect of different sunlight value,pH and the salt concentration on the stabilities of Monascus pigment were studied by means of UV-visible spectroscopy under 505 nm wavelength.Conclusion：Preserving rate reduce to 66.94%after 0.5 h direct sunlight treatment.The light intensity has more influence on the stability of Monascus pigment.Monascus pigment has a good stability under 60℃.Although short time high temperature treatment didn＇t influence the stability of Monascus pigment,the stability of Monascus pigment were decreased with the increasing of heating time after 1 h.The Monascus pigment has a good stability with pH5~9.Add Cu^（2＋） and Fe^（3＋） can change the stability of Monascus pigment obviously.It was suggested avoiding direct sunlight,high temperature,strong acid,strong alkali and heavy metal such as Cu^（2＋） and Fe^（2＋） during the processing and storage of the highland barley Monascus.

关 键 词：青稞红曲 红曲色素 稳定性 

分 类 号：TS264.4[轻工技术与工程—发酵工程]