脱脂纯牛奶感官评价与电子鼻分析.DOC

1、脱脂 纯牛奶 感官评价 与 电子鼻分析 相关性研究 迟雪露，宋铮 ， Khalmetov Muratzhan，艾娜丝 *，孙宝国 （北京工商大学北京食品营养与人类健康高精尖创新中心，北京市食品添加剂工程技术研究中心，北京市食品风味化学重点实验室 ， 北京工商大学， 北京 100048) 摘要 ： 选取 4 种市售不同品牌的 UHT 脱脂纯牛奶作为研究对象，通过感官描述性分析和电子鼻技术对其风味属性进行评价。采用主成分分析 (PCA)和聚类分析 (CA)结合偏最小二乘回归 (PLSR)法将电子鼻传感器性能和感官属性进行相关性分析。 感官评价结果 显示 样品奶油味及脂质感评分均较低 ， A 样品

2、奶腥味明显，影响整体风味 ； 对样品 进行 PCA 分析 ，结果 表明 PC1 和 PC2 的 贡献率分别为 66.87 %和 33.13 %， 区分效果 较好 ；基于感官属性和传感器响应值的 PLSR 分析建立的相关性模型， 其中 PC1 方差贡献率为 49 %，PC2 为 34 %， 能够很好地解释感官属性和传感器响应值 之间 的相关性，反映脱脂纯牛奶样品的整体信息。 关键词 ： UHT 脱脂 纯牛奶； 感官评价 ；电子鼻技术； 相关性 中图分类号 ： TS252.5 文献标识码 ： A Study on Correlation between Sensory Evaluation and

3、 Electronic Nose Sensors Analysis of Skimmed Milk Chi Xue-lu, Song Zheng, Khalmetov Muratzhan, Ai Na-si*, Sun Bao-guo ( Beijing Advanced Innovation Center for Food Nutrition and Human Health， Beijing Laboratory for Food Quality and Safety， Beijing Key Laboratory of Flavor Chemistry， Beijing Technolo

4、gy and Business University， Beijing 100048， China) Abstract: Four kinds of commercially ultra-high-temperature skimmed milk were usded in this study to evaluate the flavor attributes by sensory descriptive analysis and electronic nose technique. Principal component analysis (PCA), cluster analysis (

5、CA) and partial least squares regression (PLSR) were used to analyze the correlation between electronic nose sensor performance and sensory attributes. The results showed that creamy and fat attributes had low sensory score, obvious fresh smell has affected the overall flavor of Sample A. PCA result

6、 showed that the contribution rate of PC1 was 66.87% and that of PC2 was 33.13%, The electronic nose could distinguish four samples well. The correlation model of sensory attributes and sensor response values based on PLSR analysis, the PC1 variance contribution rate was 49% and that of PC2 was 34%.

7、Combined these two methods can make up the defects of sensory evaluation and intelligence sensory technology and available to provide a reference of improving the flavor of UHT skimmed milk. Key words: UHT skimmed milk; Sensory evaluation; Electronic nose; Correlation Foundation item: Supported by t

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