Identification of nitro-compounds with LIBS

Laser-induced breakdown spectroscopy (LIBS) is applied to characterize the organic compounds 4-nitroaniline and 4-nitrotoluene by measuring the intensity of atomic lines. The hypothesis of local thermodynamic equilibrium (LTE) is verified by comparing the measured value of electron density in the la...

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Bibliographic Details
Published in:Applied physics. B, Lasers and optics Lasers and optics, 2008-06, Vol.91 (3-4), p.645-650
Main Authors: Rai, S., Rai, A.K., Thakur, S.N.
Format: Article
Language:English
Subjects:
Atomic and molecular physics
Biological and medical applications
Breakdown
Electron density
Engineering
Exact sciences and technology
Explosives
Fundamental areas of phenomenology (including applications)
Infrared spectra
Laser spectroscopy
Lasers
Local thermodynamic equilibrium
Molecular properties and interactions with photons
Molecular spectra
Optical Devices
Optics
Organic compounds
Photonics
Physical Chemistry
Physics
Physics and Astronomy
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma (physics)
Plasma production and heating
Plasma production and heating by laser beams
Quantum Optics
Spectroscopy
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Summary:Laser-induced breakdown spectroscopy (LIBS) is applied to characterize the organic compounds 4-nitroaniline and 4-nitrotoluene by measuring the intensity of atomic lines. The hypothesis of local thermodynamic equilibrium (LTE) is verified by comparing the measured value of electron density in the laser-induced plasma with its lower limit, for which LTE holds good. The present study infers that the O/N intensity ratio is a unique parameter to discriminate each nitro-compound from the explosives.
ISSN:0946-2171
1432-0649
DOI:10.1007/s00340-008-3040-4