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Signal detection limit of a portable Raman spectrometer for the SERS detection of gunshot residue

Published online by Cambridge University Press:  05 August 2019

Evan Thayer ,
Wilson Turner ,
Stephen Blama ,
Mary Sajini Devadas  and
Ellen M. Hondrogiannis
Evan Thayer
Affiliation:
Department of Chemistry, Towson University, 8000 York Road, Towson, MD 21252, USA
Wilson Turner
Affiliation:
Department of Chemistry, Towson University, 8000 York Road, Towson, MD 21252, USA
Stephen Blama
Affiliation:
Department of Chemistry, Towson University, 8000 York Road, Towson, MD 21252, USA
Mary Sajini Devadas*
Affiliation:
Department of Chemistry, Towson University, 8000 York Road, Towson, MD 21252, USA
Ellen M. Hondrogiannis*
Affiliation:
Department of Chemistry, Towson University, 8000 York Road, Towson, MD 21252, USA
*
Address all correspondence to Ellen M. Hondrogiannis at ehondrogiannis@towson.edu; Mary Sajini Devadas at mdevadas@towson.edu
Address all correspondence to Ellen M. Hondrogiannis at ehondrogiannis@towson.edu; Mary Sajini Devadas at mdevadas@towson.edu
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Abstract

Signal detection limit (SDL), limit of detection (LOD), and limit of quantitation of a portable Raman spectrometer were measured for smokeless gunpowder stabilizers, diphenylamine (DPA) and ethyl centralite (EC), in acetone, acetonitrile, ethanol, and methanol. Acetone yielded the lowest LOD for three of four DPA peaks, and acetonitrile yielded the lowest LOD for two of three EC peaks and the remaining DPA peak. When gold nanoparticles were added to the DPA solutions in acetone and acetonitrile, statistically significant changes were observed (DPA peak position, full width at half maximum, and/or total area) and SDL was improved for the majority of all peaks in both solvents.

Type
Research Letters
Information
MRS Communications , Volume 9 , Issue 3 , September 2019 , pp. 948 - 955
Copyright
Copyright © The Author(s) 2019 

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