The adulterate milk were identified by electronic nose, and the signals were analyzed by variance analysis, PCA (principal component analysis) and clustering analysis. The best sensors array made up of 8 sensors was obtained.

• 运用PEN2便携式电子鼻对掺假牛奶进行检测,用方差分析、主成分分析和聚类分析对信号进行分析,得到由8个传感器组成的用于检测掺假牛奶的最佳传感器阵列。