摘要
还原糖含量是马铃薯育种、高附加值深加工的重要指标,马铃薯块茎中还原糖含量的高低,不仅影响其营养价值,而且还会影响食品风味,加工工艺和产品品质。本文采用6种不同的方法提取马铃薯块茎中的还原糖,并且对还原糖测定仪法和3,5-二硝基水杨酸(DNS)比色法两种测定方法进行了比较分析。结果表明,提取时加入乙醇,还原糖提取准确性好,同时延长了提取样品的保存时间。两种方法均能较好的测定马铃薯中还原糖的含量,尤其是还原糖测定仪法使用方便、测定迅速、回收率可达99%以上,是测定马铃薯中还原糖含量的更为简便、理想的方法。
Reducing sugar content in potato is an important indicator of breeding,deep processing of high value-added.Reducing sugar content in potato tuber,not only affect their nutritional value,but also affect food flavor,processing technology and product quality.The reducing sugar in potato tuber was extracted by six different methods,and the reducing sugar analyzer and 3,5-dinitrosalicylic Acid（DNS） with spectrophotometry were used to analyze the content of reducing sugar.The results indicate that the accuracy of the fifth method which added ethanol when extracting reducing sugar was better than the other,and extending the preservation time of the extracted samples at the same time.Both analyzer and ordinary methods can determine reducing sugar in tuber.The reducing sugar analyzer,especially,can determine reducing sugar in tuber more convenient,rapidly and the recovery rate generally reached more than 99 %.So it is a better method to determine the reducing sugar content in potato tuber.
出处
《食品研究与开发》
CAS
北大核心
2011年第6期104-108,共5页
Food Research and Development
基金
山东省自然基金(Y2007D54)
