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Code:
ThOC
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Time Slot/Poster Number:
10:30 - 11:00 am
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Session:
Forensics/Geoscience/Environmental/Astrobiology
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On the contribution of Raman spectroscopy to forensic science
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| Patrick Buzzini1; Genevieve Massonnet2
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1West Virginia University, Morgantown, WV; 2University of Lausanne, Lausanne, Switzerland
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| View Abstract PDF |
| Summary |
Raman spectroscopy has only recently sparked interest from forensic laboratories. The Raman technique has demonstrated important advantages such as its non-destructive nature, its fast analysis time, and especially the possibility of performing microscopical in situ analyses. In forensic applications, it is a versatile technique that covers a wide spectrum of substances such as trace evidence, illicit drugs and inks.
An overview of the recent developments of Raman spectroscopy in forensic science will be discussed. Also, the requirements for an analytical technique for the examination of physical evidence will be described. Examples of casework will be depicted.
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Code:
ThOC
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Time Slot/Poster Number:
11:30 am - 12:00 pm
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Session:
Forensics/Geoscience/Environmental/Astrobiology
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Discriminant Analysis of Raman Spectra for Body Fluid Identification for Forensic Purposes
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| Vitali Sikirzhytski; Kelly Virkler; Igor Lednev
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Department of Chemistry, University at Albany, SUN, Albany, NY
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| View Abstract PDF |
| Summary |
We elaborate a novel nondestructive, confirmatory method for the fast identification of body fluid traces on a crime scene using near IR Raman microspectroscopy. To date, an unknown biological stain has been identified via series of destructive chemical and biochemical tests. An efficient, on-field, nondestructive, and confirmatory method for body fluid identification is long awaited by the forensic community. Discriminant analysis (SIMCA, LDA and PLS-DA) allowed for discriminating semen, blood and saliva traces with over 99% confidence under laboratory conditions. The ability to make this identification on-site at a crime scene would be a major advance in the forensic analysis.
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Code:
ThOC
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Time Slot/Poster Number:
12:00 - 12:20 pm
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Session:
Forensics/Geoscience/Environmental/Astrobiology
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Time-Resolved Remote Raman Spectroscopy for Characterizing Surface Mineralogy on Planetary Surfaces
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| Shiv Sharma; Anupam Misra
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University of Hawaii, Honolulu, HI
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| View Abstract PDF |
| Summary |
Advancements in lasers, spectrographs and holographic optical components have led to the development of time-resolved (TR) remote Raman systems for planetary exploration from a lander or a rover. A TR remote Raman spectrometer capable of detecting minerals, inorganic and organic chemicals, and biogenic materials during daytime and nighttimes to radial distances in the range 10 to 125 m has been tested under terrestrial environments. In this contribution we discuss applications of a compact TR remote Raman system for detecting minerals to 50 m radial range under the Earth environment, and under simulated environments for Venus and Mars.
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