RT Journal Article
T1 Isomer discrimination in condensed phase by laser-induced breakdown spectrometry and laser-ionization mass spectrometry using a tailored paired-pulse excitation scheme
A1 Delgado-Pérez, Tomás
A1 Vadillo-Pérez, José Miguel
A1 Laserna-Vázquez, José Javier
K1 Espectroscopía de plasma inducido por láser
AB A new excitation scheme for direct analysis of organic compounds in condensed phase is described. The approach involves the combined use of two laser-ablation based techniques (laser ionization mass spectrometry (LIMS) and laser induced breakdown spectrometry (LIBS)) within a common experimental setup to simultaneously obtain atomic and molecular information capable of discriminating organic isomers. An initial laser pulse tailored to induce gentle excitation with limited fragmentation is followed by a second pulse at a specific fluence above the plasma formation threshold. Under a simultaneous ion-photon detection scheme, this configuration allows the recording of optimized optical emission and mass spectra. Despite the consecutive excitation, the low fluence conditions of the first pulse assure the sample integrity for the LIBS analysis of the successive pulse. The improved capabilities of the new excitation scheme have been demonstrated in the analysis of three dinitrotoluene isomers (2,3-, 2,4- and 2,6-), where the information provided by LIMS and LIBS is processed by a discriminant function analysis method to establish discrimination criteria for the three nitro aromatic isomers based on differences in spectral features.
PB Royal Society of Chemistry
YR 2018
FD 2018
LK https://hdl.handle.net/10630/45824
UL https://hdl.handle.net/10630/45824
LA eng
NO T. Delgado , J. M. Vadillo and J. J. Laserna, J. Isomer discrimination in condensed phase by laser-induced breakdown spectrometry and laser-ionization mass spectrometry using a tailored paired-pulse excitation scheme.  Anal. At. Spectrom., 2018, 33 , 1469 —1476
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 1 mar 2026