Method for determining vintage white spirit based on linear characteristics of fluorescence spectrum and curve fitting
A technology of curve fitting and fluorescence spectrum, which is applied in the field of determining the age of liquor based on the line shape characteristics of fluorescence spectrum and curve fitting, can solve the problems of damaging the reputation of Chinese liquor for consumers, mixing false years, and unfavorable healthy development of Chinese liquor culture.
Inactive Publication Date: 2013-02-27
JIANGNAN UNIV
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Problems solved by technology
However, due to the lack of technical standards for vintage liquor, the vintage standards for vintage liquor products are relatively random, and the vintage liquor market is chaotic.
Some lawbreakers take advantage of the current lack of technology in the identification of liquor vintages in our country to take fakes as real, inferior ones as good ones, and new ones as old ones. All kinds of behaviors have seriously damaged the interests of consumers and the reputation of Chinese liquor, which is not conducive to the Chinese liquor industry. The healthy development of China and the long history of Chinese wine culture
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[0020] The present invention will be further described below in conjunction with the accompanying drawings and according to the operation sequence of the flow chart.
[0021] (1) Use a fluorescence spectrometer to measure the three-dimensional fluorescence spectrum of liquor of the same brand in different years. All measurement samples were kept under the same parameter settings and experimental conditions. The three-dimensional fluorescence spectrum contour map of a certain year is as follows figure 2 As shown, the abscissa indicates the emission wavelength, ranging from 200nm to 600nm, with a step size of 1nm; the ordinate indicates the excitation wavelength, ranging from 200nm to 600nm, with a step length of 5nm; different curves indicate different fluorescence intensities.
[0022] (2) According to the three-dimensional fluorescence spectrum data, extract the fluorescence spectrum line shape parameters of liquor in different years, including one-eighth line width, three...
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The invention discloses a method for determining a vintage white spirit based on linear characteristics of fluorescence spectrum and curve fitting, wherein the linear parameters of the vintage white spirit spectrum include one-eighth line width, three-eighths line width, five-eighths line width, seven-eighths line width, one-quarter line width, one-second line width and three-quarters line width; the three-dimensional fluorescence spectrums of different vintage white spirits of one brand are measured; the linear parameters of the fluorescence spectrums of different vintage white spirits are obtained from the three-dimensional fluorescence spectrum data; the function relational expression of the year of each vintage white spirit to each linear parameter of the fluorescence spectrum thereof is obtained through curve fitting; the three-dimensional fluorescence spectrum of a white spirit sample of unknown year is measured, the linear parameters of the fluorescence spectrum are extracted, and the linear parameters are substituted into the corresponding function expression to obtain a corresponding function value; and the determined vintage of the white spirit sample can be obtained through processing such as averaging, approximating and the like. The method provided by the invention is simple to operate and reliable in result, and can be used for determining the vintage of the white spirit.
Description
technical field [0001] The invention belongs to the technical field of liquor identification, in particular to a method for determining the age of liquor based on fluorescence spectrum line characteristics and curve fitting. Background technique [0002] Liquor is a traditional fermented food in my country. It has a huge consumer market, rich consumption levels and numerous consumer groups. It has formed a long history of wine culture in my country. People have always believed that "wine is the fragrance of aging". In recent years, as a high-end product in the Chinese liquor industry, vintage liquor has been popular in the market, and its price has soared. It has gradually become the focus of the development of liquor companies. However, due to the lack of technical standards for vintage liquor, the vintage standards for vintage liquor products are relatively random, and the vintage liquor market is in chaos. Some lawbreakers take advantage of the current lack of technology...
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IPC IPC(8): G01N21/64
Inventor 陈国庆吴亚敏徐岩朱拓孔凡标朱纯朱焯炜
Owner JIANGNAN UNIV