摘要
采用近红外光谱技术和主成分分析法相结合的检测手段,从60年、90年、200年窖龄的窖池和封窖泥中取样,每个窖池样本为12个,测量其近红外漫反射红外光谱,在4000～10000 cm-1区间选取不同范围内的光谱数据,对48个样本进行主成分分析,作二维线性投影图和三维线性投影图,比较了48个样品在红外光谱上的差异程度,发现基于傅里叶变换近红外光谱的主成分分析投影图能够较好地表征48个样品的类别关系,不同窖龄的样本在空间分布中能够得到较好的区分。结果表明,应用近红外漫反射光谱法能够鉴别窖泥的使用年份。作为一种窖泥质量检测手段,该方法具有一定的应用价值。
48 pit mud samples in total were obtained fxom three pits （pit of 60 years age, pit of 90 years age, and pit of 200 years age） and pit mud for pit-sealing （12 samples for each pit）. Then main components analysis of those pit mud samples was carried out by near infrared spectroscopy with diffuse reflection method （the spectra data between 4000 and 10000 wave-numbers）.Through the analysis of two dimensional and three di- mensional projection figures, it was found that the figures could clearly reflect the difference of different pit mud samples and pit mud of different age could be differentiated in space distribution. As a method of controlling and detecting the quality of pit mud, near infrared spectroscopy and main components analysis was valuable in practice.
出处
《酿酒科技》
2011年第8期36-38,共3页
Liquor-Making Science & Technology
基金
四川省科技支撑计划项目
编号2010SZ0228
关键词
主成分分析(PCA)
近红外光谱
窖泥
聚类
principal component analysis（PCA）
near infrared spectroscopy （NIR）
pit mud
cluster
