METHOD AND SPECTROSCOPIC ANALYSIS APPLIANCE, ESPECIALLY FOR ANALYSING FOOD, WITH MULTI-CHANNEL TREATMENT OF SPECTRAL DATA
First Claim
1. Method for spectroscopic analysis of at least one sample implementing a method for analysis of spectroscopic data based on a multi-way statistical model, which method includes:
- a) the illumination of said or of each sample to be analyzed by a plurality of excitation light radiations with respective wavelengths;
b) the acquisition of front-face fluorescence spectra of said or of each sample, each corresponding to a respective excitation light radiation;
c) a pre-processing of the fluorescence spectra acquired;
d) for each sample, the calculation of a score vector by application to the pre-processed spectra of said multi-way statistical model, identified by a fluorescence excitation loading vector and by an emission loading vector; and
e) the determination of at least one parameter chosen from a quality indicator of said or of each sample and a parameter characterizing a method to which said or each sample has been subjected, on the basis of said score vector;
the method being characterized in that the average spectral gap between said excitation light radiation is at least 50 nm over a spectral range of at least 100 nm.
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Abstract
The invention relates to a method for the spectroscopic analysis of at least one sample, using a method for analysing spectroscopic data based on a multi-channel statistical model, said method comprising: the illumination of said or each sample to be analysed by a plurality of luminous excitation rays with respective wavelengths; the acquisition and the pre-treatment of frontal fluorescence spectra, each spectrum corresponding to a respective luminous excitation ray; for each sample, the calculation of a score vector by applying said multi-channel statistical model to the pre-treated spectra; and the determination of at least one parameter selected from a quality indicator of said or each sample and a parameter characterising a method that has been applied to said or each sample, from said score vector; the method being characterised in that the average spectral distance between the luminous excitation rays is at least 50 nm, over a spectral range of at least 100 nm. The invention also relates to an appliance for implementing such a method.
7 Citations
18 Claims
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1. Method for spectroscopic analysis of at least one sample implementing a method for analysis of spectroscopic data based on a multi-way statistical model, which method includes:
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a) the illumination of said or of each sample to be analyzed by a plurality of excitation light radiations with respective wavelengths; b) the acquisition of front-face fluorescence spectra of said or of each sample, each corresponding to a respective excitation light radiation; c) a pre-processing of the fluorescence spectra acquired; d) for each sample, the calculation of a score vector by application to the pre-processed spectra of said multi-way statistical model, identified by a fluorescence excitation loading vector and by an emission loading vector; and e) the determination of at least one parameter chosen from a quality indicator of said or of each sample and a parameter characterizing a method to which said or each sample has been subjected, on the basis of said score vector; the method being characterized in that the average spectral gap between said excitation light radiation is at least 50 nm over a spectral range of at least 100 nm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification