Quick and accurate identification method of baijiu scent types

A kind of liquor and aroma technology, applied in the field of analytical chemistry

Inactive Publication Date: 2018-03-13
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

But near-infrared spectroscopy needs to be modeled in advance using chemometric software

Method used

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  • Quick and accurate identification method of baijiu scent types
  • Quick and accurate identification method of baijiu scent types

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[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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PUM

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Abstract

The invention relates to a quick and accurate identification method of baijiu scent types, comprising the specific steps of using a near-infrared spectrometer to scan near-infrared spectrum of a sample to obtain near-infrared spectral data; pretreating a data matrix; using the two chemical pattern recognition methods of HCA (hierarchical cluster analysis) and PLS-DA (partial least squares discriminant analysis) to model the data, determining an optimal modeling method, and using the optimal modeling method to predict unknown scent types. The pattern recognition method of partial least squaresdiscriminant analysis is used herein to identify baijiu scent types and has high correct rate, high speed and good effect. The quick and accurate identification method of baijiu scent types is applicable to identification of baijiu with different scent types.

Description

technical field [0001] The invention belongs to the spectrum analysis technology in the field of analytical chemistry, and relates to a method for quickly and accurately identifying the aroma type of liquor. Background technique [0002] my country has a history of drinking liquor in ancient times, and liquor occupies a large market in China. The brewing process is rich and colorful, and the chemical components of the brewed wine are different, resulting in different aroma types. The aroma types of Chinese liquor mainly include sauce-flavored, strong-flavored, light-flavored, rice-flavored and other flavors. [0003] The traditional method of identifying the aroma type of liquor is manual wine tasting. This method is not only inaccurate, but also has great limitations. It requires a lot of experience from wine tasters, so it cannot be widely used. In addition, it has high requirements on the feeling, so it is easy to make mistakes, especially the human sense is sometimes n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/359
CPCG01N21/359
Inventor 刘鹏卞希慧徐浩
Owner TIANJIN POLYTECHNIC UNIV
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