Method for performing clustering analysis and identification on substances by adopting Raman spectrums
A Raman spectroscopy and cluster analysis technology, applied in Raman scattering, material excitation analysis, character and pattern recognition, etc., can solve the problems of low signal-to-noise ratio, difficult identification, affecting the practicability of the instrument, etc., to achieve the application scope Wide range, wide application range, simple method effect
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[0060] A method that uses Raman spectroscopy to perform cluster analysis and identification of substances. This method is to select three types of pharmaceutical tablets A, B, and C that use the same excipients but have different APIs to perform Raman spectrum identification. It includes the following steps:
[0061] ① Collect the Raman spectra of the samples by the Raman spectrometer. The sample set consists of three types of samples of A, B, and C with the number of samples of 15, 10, and 10, and 5 independent samples, totaling 40. sample.
[0062] figure 1 It is the score map of the first and second principal components obtained by principal component analysis (PCA) for 40 samples. In the figure, various samples and isolated samples overlap, and the partition cannot be determined.
[0063] The spectra of all samples are as figure 2 , The sample’s excipients have a strong fluorescence effect, which is figure 2 Intuitively, the spectral lines are similar, making direct identifica...
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