RT info:eu-repo/semantics/article T1 Confocal Raman spectrocopy for the analysis of nail polish evidence A1 López López, María A1 Vaz, Joana A1 García Ruiz, Carmen K1 Nail polishes K1 Raman spectroscopy K1 Nail polishes smudges K1 Evidence sampling K1 Química K1 Chemistry AB Nail polishes are cosmetic paints that may be susceptible of forensic analysis offering useful information to assist in a crime reconstruction. Although the nail polish appearance could allow a quick visual identification of the sample, this analysis is subjected to the perception and subjective interpretation of the forensic examiner. The chemical analysis of the nail polishes offers great deal of information not subjected to analyst interpretation. Confocal Raman spectroscopy is a well-suited technique for the analysis of paints due to its non-invasive and non-destructive nature and its ability to supply information about the organic and inorganic components of the sample. In this work, 77 regular and gel nail polishes were analyzed with confocal Raman spectroscopy using two laser wavelengths (532 and 780 nm). The sample behavior under the two laser wavelengths and the differences in the spectra taken at different points of the sample were studied for each nail polish. Additionally, the spectra obtained for all the nail polishes were visually compared. The results concluded that the longer laser wavelength prevents sample burning and fluorescence effects; the similarity among the spectra collected within the sample is not directly related with the presence of glitter particles; and 64% of the samples analyzed showed a characteristic spectrum. SN 0039-9140 YR 2015 FD 2015-01-01 LK http://hdl.handle.net/10017/51275 UL http://hdl.handle.net/10017/51275 LA eng DS MINDS@UW RD 28-mar-2024