1.
Eur J Mass Spectrom (Chichester)
; 23(4): 140-145, 2017 Aug.
Article
in English
| MEDLINE
| ID: mdl-29028403
ABSTRACT
The paper presents the results of research and development of ion mobility spectrometer with laser ion sources for detecting ultra-low quantities of explosives in air. Particular attention is paid to the mechanisms of the formation of negative ions. It is shown that laser ionization with respect to ion mobility spectrometry provides an increase of sensitivity and selectivity of detection. The ion mobility spectra of the most common nitro explosives are investigated. The detection threshold for laser ion mobility spectrometer was reached at the level of 10-14 g/cm3 (for trinitrotoluene).