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Design Considerations for a Portable Raman Probe Spectrometer for Field Forensics

Journal Article · · International Journal of Spectroscopy
DOI:https://doi.org/10.1155/2012/938407· OSTI ID:1052928
 [1];  [1];  [1];  [1]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Raman spectroscopy has been shown to be a viable method for explosives detection. Currently most forensic Raman systems are either large, powerful instruments for laboratory experiments or handheld instruments forin situpoint detection. We have chosen to examine the performance of certain benchtop Raman probe systems with the goal of developing an inexpensive, portable system that could be used to operate in a field forensics laboratory to examine explosives-related residues or samples. To this end, a rugged, low distortion line imaging dispersive Raman spectrograph was configured to work at 830 nm laser excitation and was used to determine whether the composition of thin films of plastic explosives or small (e.g., ≤10 μm) particles of RDX or other explosives or oxidizers can be detected, identified, and quantified in the field. With 300 mW excitation energy, concentrations of RDX and PETN can be detected and reconstructed in the case of thin Semtex smears, but further work is needed to push detection limits of areal dosages to the ~1μg/cm2level. We describe the performance of several probe/spectrograph combinations and show preliminary data for particle detection, calibration and detection linearity for mixed compounds, and so forth.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1052928
Report Number(s):
PNNL-SA--86322; 400403309
Journal Information:
International Journal of Spectroscopy, Journal Name: International Journal of Spectroscopy Vol. 2012; ISSN 1687-9449
Publisher:
HindawiCopyright Statement
Country of Publication:
United States
Language:
English

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Rapid Poultry Spoilage Evaluation Using Portable Fiber-Optic Raman Spectrometer journal March 2018
A review of Raman spectroscopy advances with an emphasis on clinical translation challenges in oncology journal November 2016

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