Combining spectroscopic data in the forensic analysis of paint: Application of a multiblock technique as chemometric tool

Lambert, Danny; Muehlethaler, Cyril; Esseiva, Pierre; Massonnet, Geneviève

doi:10.1016/j.forsciint.2016.03.049

Cited by 25 publications

(8 citation statements)

References 23 publications

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“…Besides spray paint, house paints can also be relevant to forensics. Lambert et al employed common component and specific weight analysis (CCSWA) to help differentiation of red house paints using both Raman and FT-IR spectra …”

Section: Paintmentioning

confidence: 99%

Toward Locard’s Exchange Principle: Recent Developments in Forensic Trace Evidence Analysis

et al. 2018

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Section: Paintmentioning

confidence: 99%

Toward Locard’s Exchange Principle: Recent Developments in Forensic Trace Evidence Analysis

et al. 2018

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“…FTIR has the capacity to perform global assessment of components found in samples with no need of sample preparation, which is practically impossible with other routine analytical approaches. In forensic investigations, FTIR has been extensively utilized in multiple evidence-based cases at a crime scene, including questioned documents 11 , banknotes 12 , paints 13 , fibers 14 , hair 15 and gunshot residues 16 . Alternatively, the feasibility of FTIR for chemically analyzing biological specimens has been demonstrated by other studies; indeed, multiple macromolecules, such as proteins, lipids, carbohydrates, and nucleic acids, can be monitored simultaneously in an FTIR spectrum based on their unique infrared absorption frequencies 17 , 18 .…”

Section: Introductionmentioning

confidence: 99%

Application of Fourier transform infrared spectroscopy with chemometrics on postmortem interval estimation based on pericardial fluids

Zhang

Wang

et al. 2017

Sci Rep

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Postmortem interval (PMI) evaluation remains a challenge in the forensic community due to the lack of efficient methods. Studies have focused on chemical analysis of biofluids for PMI estimation; however, no reports using spectroscopic methods in pericardial fluid (PF) are available. In this study, Fourier transform infrared (FTIR) spectroscopy with attenuated total reflectance (ATR) accessory was applied to collect comprehensive biochemical information from rabbit PF at different PMIs. The PMI-dependent spectral signature was determined by two-dimensional (2D) correlation analysis. The partial least square (PLS) and nu-support vector machine (nu-SVM) models were then established based on the acquired spectral dataset. Spectral variables associated with amide I, amide II, COO−, C-H bending, and C-O or C-OH vibrations arising from proteins, polypeptides, amino acids and carbohydrates, respectively, were susceptible to PMI in 2D correlation analysis. Moreover, the nu-SVM model appeared to achieve a more satisfactory prediction than the PLS model in calibration; the reliability of both models was determined in an external validation set. The study shows the possibility of application of ATR-FTIR methods in postmortem interval estimation using PF samples.

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“…In addition, ATR-FT-IR spectroscopy has recently been used to evaluate the effect of cause of death on the estimation of the post-mortem interval from seven rats organs including the brain, heart, lung, liver, spleen, kidney, and skeletal muscle [36]. Non-biological traces such as paints [37] cosmetics [38], fibers [39], gunshot residues [40], and gasoline [41] have also been studied using FT-IR spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Spectroscopy as a useful tool for the identification of changes with time in post-mortem vitreous humor for forensic toxicology purposes

et al. 2021

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Vitreous humor (VH) is an alternative biological matrix with a great advantage of longer availability for analysis due to the lack of many enzymes. The use of VH in forensic toxicology may have an added benefit, however, this application requires rapid, simple, non-destructive, and relatively portable analytical analysis methods. These requirements may be met by Fourier transform infrared spectroscopy technique (FT-IR) equipped with attenuated total reflection accessory (ATR). FT-IR spectra of vitreous humor samples, deposited on glass slides, were collected and subsequent chemometric data analysis by means of Hierarchical Cluster Analysis and Principal Component Analysis was conducted. Differences between animal and human VH samples and human VH samples stored for diverse periods of time were detected. A kinetic study of changes in the VH composition up to 2 weeks showed the distinction of FT-IR spectra collected on the 1st and 14th day of storage. In addition, data obtained for the most recent human vitreous humor samples—collected 3 and 2 years before the study, presented successful discrimination of all time points studied. The method introduced was unable to detect mephedrone addition to VH in the concentration of 10 µg/cm3. Graphic abstract

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Combining spectroscopic data in the forensic analysis of paint: Application of a multiblock technique as chemometric tool

Cited by 25 publications

References 23 publications

Toward Locard’s Exchange Principle: Recent Developments in Forensic Trace Evidence Analysis

Toward Locard’s Exchange Principle: Recent Developments in Forensic Trace Evidence Analysis

Application of Fourier transform infrared spectroscopy with chemometrics on postmortem interval estimation based on pericardial fluids

Spectroscopy as a useful tool for the identification of changes with time in post-mortem vitreous humor for forensic toxicology purposes

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