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Method for identifying baijiu of different brands by combining three-dimensional fluorescence spectrum and parallel factor

A three-dimensional fluorescence and parallel factor technology, applied in the field of liquor identification, can solve the problem of increasing data analysis time, etc., and achieve the effects of intuitive and reliable results, high detection sensitivity, and simple operation.

Active Publication Date: 2015-06-03
JIANGNAN UNIV
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Problems solved by technology

The main problem is that decomposing the samples to be tested and the training samples together will greatly increase the time for data analysis, which has certain limitations in the actual rapid detection application

Method used

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  • Method for identifying baijiu of different brands by combining three-dimensional fluorescence spectrum and parallel factor
  • Method for identifying baijiu of different brands by combining three-dimensional fluorescence spectrum and parallel factor
  • Method for identifying baijiu of different brands by combining three-dimensional fluorescence spectrum and parallel factor

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Embodiment example

[0024] Implementation case: classification and identification of 8 different brands of liquor.

[0025] (1) Use the fluorescence spectrometer FLS920 to measure the three-dimensional fluorescence spectra of 8 different brands of liquor:

[0026] a. Sample preparation: collect 8 different brands of Luzhou-flavor liquor, prepare 20 samples for each brand of liquor, a total of 140 samples. For specific liquor information, see Table 1. The entire sample set is split into a training set (120 wine samples, 15 from each brand) and a test set (40 wine samples, 5 from each brand).

[0027] b. Scanning conditions: xenon lamp light source 450w; detection temperature -20 degrees; excitation wavelength range: 200-600nm, step size 5nm; emission wavelength range: 215-800nm, step size 1nm.

[0028] c. Export three-dimensional data through software to obtain three-dimensional fluorescence spectrum data of different wine samples. figure 2 (a)-(h) are the three-dimensional fluorescence contou...

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Abstract

The invention discloses a method for identifying baijiu of different brands by combining a three-dimensional fluorescence spectrum and a parallel factor, belonging to the technical field of baijiu identification. The method disclosed by the invention comprises the following steps: (1) obtaining the three-dimensional fluorescence spectrum data of baijiu of different brands by using a fluorescence spectrophotometer; (2) establishing an identification model of baijiu of different brands, namely decomposing the spectrum data by utilizing a parallel factor method, thus obtaining a loading matrix and a concentration score, and by taking the concentration score as input of a support vector machine, establishing an identification model of the brands of the baijiu; and (3) predicting the brands of the baijiu, specifically, for the predicted sample, performing testing to obtain the three-dimensional fluorescence spectrum data, and obtaining the concentration score by utilizing a genetic algorithm and by keeping the loading matrix invariable, inputting the concentration score into the identification model and outputting the predicted brand value. According to the method disclosed by the invention, a complicated chemical separation process is avoided, the method has the advantages of rapidness, safety, simplicity in operation, low price, nondestructive property and the like, and the identification model of baiju in different places of origin can be further established.

Description

technical field [0001] The present invention relates to a method for identifying different brands of liquor through three-dimensional fluorescence spectrum combined with parallel factors. Profiles of components and their corresponding concentration scores. 2. Use the genetic algorithm to obtain the concentration score of the test sample. This method avoids the shortcoming that all samples must be decomposed together by the parallel factor, so that the concentration score of the test sample can be obtained quickly and accurately. The invention belongs to the technical field of liquor identification. Background technique [0002] Chinese liquor has a history of more than 2,000 years, and its unique flavor is loved by the common people. Due to differences in raw materials and brewing techniques, etc., different aroma types of liquor have been formed. The main aroma types are Luzhou, Qingxiang, Maotai and so on. Even for the same flavor liquor, due to the differences in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64
Inventor 朱焯炜陈国庆阙立志朱纯张秀梅
Owner JIANGNAN UNIV
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