Quick and accurate identification method of baijiu scent types
A kind of liquor and aroma technology, applied in the field of analytical chemistry
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[0018] 1) Purchase 3 types of Laobaigan-flavored liquors, 4 types of Luzhou-flavored liquors, and 3 types of Fen-flavored liquors from major supermarkets, for a total of 10 types of liquors with 3 types of aromas, and number them from 1 to 10.
[0019] 2) Scan the near-infrared spectrum of the sample with a TJ270-60 double-beam near-infrared spectrophotometer. The measurement mode is set to absorbance, continuous fast scanning, the sampling interval is set to 2nm, the spectral bandwidth is set to normal, the wavelength range is 800-2500nm, and the instrument is warmed up for 30 minutes before measurement. Under the background conditions of an empty 1mm sample cell and air, put it into the instrument for baseline scanning, and measure the samples in sequence according to the serial number of 1-10. The spectrum of each sample is measured 3 times and saved, and finally the average value is taken.
[0020] 3) Use the HCA algorithm to optimize the inter-class distance and intra-cla...
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