RT Journal Article
T1 Differentiation of closely related mineral phases in Mars atmosphere using frequency domain laser-induced plasma acoustics.
A1 Álvarez-Llamas, César
A1 Purohit, Pablo
A1 Moros-Portolés, Javier
A1 Laserna-Vázquez, José Javier
K1 Espectroscopía de plasma inducido por láser
AB The combination of data yielded by laser-induced breakdown spectroscopy (LIBS) and laser-induced plasmaacoustics (LIPAc) is a topic of many prospective applications as these coexisting phenomena can cover differentsample traits. Among the most interesting features that LIPAc could add to the expanded target picture is information concerning structure and geophysical characteristics elusive to LIBS. In the present work, frequencyspectra of minerals were explored to discriminate between chemically similar mineralogical phases. Severalreplicas of four different Fe-based minerals were analyzed to identify spectral traits linked to their chemistry inthe frequency domain. First, the similarity between replicas of the same mineral family was verified and then, thecosine and Euclidian distances to minerals of different species were calculated to evaluate the discriminationcapabilities of frequency spectra with results being compared to those obtained by LIBS. A partial least-squaresone-vs-all model is described seeking to demonstrate sample classification by frequency means exclusively. As theuse of LIBS-LIPAc for in-field mineral sorting has sparked interest, experiments reported were performed instand-off within a thermal vacuum chamber (TVC). The TVC allowed data acquisition under Earth and Mars-likeconditions, with the latter serving as a test of high relevance to assess the general applicability of the conclusionsreached in Earth environment. Thorough discussion of data treatment is included with a focus on the impact ofinterference patterns arising from the laser-induced shockwave interaction with the medium surrounding thesample to avoid non-sample related information in the data processing schemes.
PB Elsevier
YR 2022
FD 2022-08-16
LK https://hdl.handle.net/10630/28706
UL https://hdl.handle.net/10630/28706
LA eng
NO César Alvarez-Llamas, Pablo Purohit, Javier Moros, Javier Laserna, Differentiation of closely related mineral phases in Mars atmosphere using frequency domain laser-induced plasma acoustics, Analytica Chimica Acta, Volume 1226, 2022, 340261, ISSN 0003-2670, https://doi.org/10.1016/j.aca.2022.340261
NO This work was supported by the projects UMA18-FEDERJA-272 (Junta de Andalucía) and PID2020-119185GB-I00 (Ministerio de Ciencia e Innovación,  Spain). P.P. is grateful to the European Union’s NextGenerationEU plan and the Spanish Ministerio de Universidades for his Margarita Salas fellowship under the program “Ayudas para la recualificación del Sistema Universitario espanol ”. Funding for open access charge: Universidad de Málaga/CBUA.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 3 mar 2026