On the Possibility of Using Discriminant Analysis of IR Spectra in Comparative Forensic Research of Synthetic Drugs

Abstract

This work aimed to study the possibility of using chemometric methods in the analysis of IR spectra in the middle region for a comparative study of narcotic drugs. The results of using a chemometric (discriminant) method for analyzing the IR spectra of the middle IR-region of samples of the narcotic drug α-pyrrolidinovalerophenone from different sources of seizure are presented, which allowed us to divide the investigated substances into different classes and refer them to different sources. It was found that when forming the table of standards, it is necessary to minimize the influence of the background, the concentration of the active substance in the tablet with potassium bromide, and the thickness of the light-absorbing layer.