METHODOLOGY FOR THE IDENTIFICATION OF MATERIALS THROUGH METHODS OF COMPARISON OF THE SPECTRUM OF A SAMPLE AGAINST A REFERENCE LIBRARY OF SPECTRA OF MATERIALS

摘要

The present invention relates to a method of comparison of spectra from the spectrum of a sample and at least one spectrum of a reference library (Pref1, Pref2, Pref3), the method comprising the steps of: obtaining at least one relevant spectral peak (P1, P2, P3 and P4) from the sample spectrum and comparing each of the relevant spectral peaks (P1, P2, P3, P4) obtained with the spectra in the reference library (Pref1, Pref2, Pref3). It further relates to a method of comparison of spectra from the second derivative of the sample spectrum and the second derivative of the reference library spectra. It also describes a method of comparison of spectra with the previous identification of the major component of a sample, the method comprising the step of correlating triangularly the spectra of the sample, the reference and the major component. Finally, it describes devices to ensure the uniformity of readings from various devices and compatibility with spectral libraries, the fastening and uniform positioning of the samples and standardization with the aid of calibrators.