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Ultra-trace Level Detection of Nonvolatile Compounds Studied by Ultrasonic Cutter Blade Coupled with Dielectric Barrier Discharge Ionization-mass Spectrometry by Bi, Lei; Habib, Ahsan; Chen, La; Xu, Tiefeng; Wen, Luhong is a Chemistry article available to read on EtoBox.

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In analytical mass spectrometry, an efficient desorption is needed for nonvolatile compounds at ultra-trace level detection. In this paper, an ultrasonic cutter-assisted non-thermal desorption method for ultra-trace level detection of different types of nonvolatile compounds such as drugs of abuse, explosives, pharmaceuticals, spinosad, cholesterol, rhodamine B, glucose and amino acids has been described. The relevant compounds were deposited on the ultrasonic blade except pharmaceutical tablets that were used directly, and gently touched on perfluoroalkoxy (PFA) made substrate with oscillation frequency about 40 kHz in order to desorb the solid molecules. The desorbed gaseous molecules were ionized using a home-made helium dielectric barrier discharge ionization (DBDI) source and then detected by an ion trap mass spectrometer. The synergistic effect caused by gaining the oscillation and frictional/mechanical energy enhanced desorption of the solid molecules into gaseous phase, thereby, resulting in detection at ultra-trace level. PFA made substrate showed better limits of detection (LODs) compared to that of wood made substrate. The LOD values for most of the target analytes were

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Author

Bi, Lei; Habib, Ahsan; Chen, La; Xu, Tiefeng; Wen, Luhong

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0039-9140)

Published

2021

Language

EN

Field

Chemistry (Physical Sciences)