THERMO-DESORPTION THERMO-IONIC SPECTROSCOPY: HIGH SENSITIVE DETECTION OF TRACE AMOUNTS OF SYNTHETIC CANNABINOID АВ-CHMINACA IN SMOKING-MIXTURES
Abstract
The results of thermodesorption thermoionic (surface-ionization) spectrometry (TDTIS) investigations of synthetic cannnabinoid АВ-Chminaca (a derivative of indazole) and seized smoking mixtures on diverse matrixes have been presented. Thermoionic profiles have been obtained with thermoemitters from molybdenum oxide doped with iridium in air. Thermoionic and thermodesorption characteristics of molecules, limits of detection and matrix effect on TDTIS spectra have been defined. The high efficiency of ionization (up to 100 K/mol) and low limits of detection (from 0.1 pmol) have been determined without preliminary separation of samples and owing to high selectivity of the TDTIS method, which makes it possible its application in toxicological and forensic laboratories.