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Eur J Mass Spectrom (Chichester)

Title:		"Laser-stimulated desorption of organic molecules from surfaces, as a method of increasing the efficiency of ion mobility spectrometry analysis"
Author(s):		Akmalov AE; Chistyakov AA; Kotkovskii GE;
Address:		"National Research Nuclear University, Moscow Engineering Physics Institute, Moscow, Russian Federation"
Journal Title:		Eur J Mass Spectrom (Chichester)
Year:		2017
Volume:		20170614
Issue:		4
Page Number:		174 - 180
DOI:		10.1177/1469066717714417
ISSN/ISBN:		1469-0667 (Print) 1469-0667 (Linking)
Abstract:		"Application of laser-induced desorption was investigated as a method of increasing the efficiency of gas phase analyzers on principles of field asymmetric ion mobility spectrometry. Mass spectrometric data of investigations of laser desorption of pentaerythritoltetranitrate molecules and cyclotetramethylenetetranitramine molecules from quartz substrate under vacuum were obtained. Laser sources a Nd(3+):YAG with nanosecond pulse duration (lambda = 532 nm) and a continuous wave diode laser (lambda = 440 nm) were used. It was shown that both laser sources have different desorption abilities. This is expressed in various time of appearance of desorbed products that is caused by different heating mechanisms of surface layer. The desorbed quantity under action of both laser sources exceeds the detection threshold for all modern gas phase analyzers. It should be noted that despite the presence of surface dissociation of explosives under laser radiation, the quantity of nondissociated molecules is large enough for detection by ion mobility and field asymmetric ion mobility spectrometers. The optimal parameters of laser radiation for effective removal (evaporation) molecules of low-volatile compounds from surfaces are defined. The conclusion about preferable use of a Nd(3+):YAG laser for increasing the detection ability of detectors based on ion mobility spectrometry was made"
Keywords:		Laser radiation desorption explosives field asymmetric ion mobility intensity mass spectrometer spectrometer;
Notes:		"PubMed-not-MEDLINEAkmalov, Artem E Chistyakov, Alexander A Kotkovskii, Gennadii E eng England 2017/10/14 Eur J Mass Spectrom (Chichester). 2017 Aug; 23(4):174-180. doi: 10.1177/1469066717714417. Epub 2017 Jun 14"