Identification of standard explosive traces by infrared laser spectroscopy: PCA on LPAS data

G. Giubileo, F. Colao, A. Puiu

Research output: Contribution to journalArticle

14 Citations (Scopus)


Infrared spectroscopy based methods are promising in the design of an integrated optical system for the real time detection and identification of explosive species to support homeland security. Infrared laser photoacoustic spectroscopy (LPAS) analysis of explosive compounds (DNT; TNT; RDX; HMX; TATP; PETN; TETRYL) and TOLUENE was reported. Standard commercial samples of the explosive species were analyzed in solid phase by a home made PAS apparatus equipped with a stabilized 10 W continuous wave CO2 laser source. A very small amount (less than 100 μg) of the sample was sufficient to produce a clear signal in a 3 cc volume PA cell. The spectral data were treated by a principal component analysis (PCA) based algo- rithm. In a three principal components representation of the results, every explosive species resulted to be very well distinguishable from each other, as well as from toluene and other solvents. The reported experimental activity was performed in the Molecular Spectroscopy Laboratory of ENEA Research Centre in Frascati in the frame of ISOTREX European Project. © Pleiades Publishing, Ltd., 2012.
Original languageEnglish
Pages (from-to)1033 - 1037
Number of pages5
JournalLaser Physics
Issue number6
Publication statusPublished - Jun 2012
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Industrial and Manufacturing Engineering

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