5th International Conference of Photonics and Information Optics | |
Laser desorption of traces of low volatile explosives | |
Akmalov, A.E.^1 ; Chistyakov, A.A.^1 ; Kotkovskii, G.E.^1 | |
National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, 31 Kashirskoe shosse, Moscow | |
115409, Russia^1 | |
关键词: Analytes; Cyclotrimethylenetrinitramine (RDX); E-pulse; Laser desorption; Laser sources; Laser-based; Quartz substrate; | |
Others : https://iopscience.iop.org/article/10.1088/1742-6596/737/1/012039/pdf DOI : 10.1088/1742-6596/737/1/012039 |
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来源: IOP | |
【 摘 要 】
Comparison of desorption effectiveness of two laser sources: continuous diode laser (λ = 440 nm, P = 0.5 W) and laser based on YAG: Nd3+ (X = 266 nm, τpulse= 6 ns, Epulse= 1.0 mJ, f = 10 Hz, Ipulse= 108W/cm2) was carried out for the explosive cyclotrimethylenetrinitramine (RDX). The results of mass spectrometric studies of RDX laser desorption from a quartz substrate are discussed. It is shown that a continuous diode laser (λ = 440 nm) effectively desorbs the analyte without accompanying dissociation. The typical desorbed mass is 70 ng for RDX at 1.1 minutes exposure. However a laser based on YAG: Nd3+seems to be more efficient for the same time exposure.
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Laser desorption of traces of low volatile explosives | 799KB | download |