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

2019 ◽  
Vol 9 (3) ◽  
pp. 948-955 ◽  
Author(s):  
Evan Thayer ◽  
Wilson Turner ◽  
Stephen Blama ◽  
Mary Sajini Devadas ◽  
Ellen M. Hondrogiannis
Keyword(s):  
Detection Limit ◽  
Signal Detection ◽  
Gunshot Residue ◽  
Raman Spectrometer ◽  
Sers Detection ◽  
Image Position ◽  
Portable Raman

Abstract

Sampling unit for efficient signal detection and application to liquid chromatography-Raman spectroscopy

2021 ◽  
Author(s):  
Yu-Hao Lo ◽  
Shu-Chi Li ◽  
Hirotsugu Hiramatsu
Keyword(s):  
Raman Spectroscopy ◽  
Liquid Chromatography ◽  
Signal Detection ◽  
Signal Intensity ◽  
Sampling Unit ◽  
Raman Spectrometer ◽  
Unit Design

A new sampling unit design enhances the signal intensity and is available to combine Raman spectrometer with liquid chromatography.

Characterisation of a portable Raman spectrometer for in situ analysis of art objects

2014 ◽  
Vol 118 ◽  
pp. 294-301 ◽  
Author(s):  
Debbie Lauwers ◽  
Anna Garcia Hutado ◽  
Vinka Tanevska ◽  
Luc Moens ◽  
Danilo Bersani ◽  
...  
Keyword(s):  
In Situ Analysis ◽  
Raman Spectrometer ◽  
Art Objects ◽  
Portable Raman

Rapid detection of gasoline by a portable Raman spectrometer and chemometrics

2012 ◽  
Vol 43 (10) ◽  
pp. 1487-1491 ◽  
Author(s):  
Xiaofang Zhang ◽  
Xiaohua Qi ◽  
Mingqiang Zou ◽  
Jingwei Wu
Keyword(s):  
Rapid Detection ◽  
Raman Spectrometer ◽  
Portable Raman

Rapid and Simple Analysis of the Human Pepsin Secondary Structure Using a Portable Raman Spectrometer

2021 ◽  
Author(s):  
Tong-Jiang Li ◽  
Bao-Ying Wen ◽  
Xiao-Hui Ma ◽  
Wan-Ting Huang ◽  
Jin-Zhun Wu ◽  
...  
Keyword(s):  
Secondary Structure ◽  
Simple Analysis ◽  
Raman Spectrometer ◽  
Portable Raman

scholarly journals Tetrahydrocannabinol Sensing in Complex Biofluid with Portable Raman Spectrometer Using Diatomaceous SERS Substrates

Biosensors ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 125 ◽  
Author(s):  
Sivashanmugan ◽  
Zhao ◽  
Wang
Keyword(s):  
Diatomaceous Earth ◽  
Microfluidic Channel ◽  
Principal Component ◽  
Surface Enhanced Raman Spectroscopy ◽  
Forensic Analysis ◽  
Sample Type ◽  
Raman Spectrometer ◽  
Sers Substrates ◽  
Tlc Separation ◽  
Portable Raman

Using thin-layer chromatography in tandem with surface-enhanced Raman spectroscopy (TLC-SERS) and tetrahydrocannabinol (THC) sensing in complex biological fluids is successfully conducted with a portable Raman spectrometer. Both THC and THC metabolites are detected from the biofluid of marijuana-users as biomarkers for identifying cannabis exposure. In this article, ultra-sensitive SERS substrates based on diatomaceous earth integrated with gold nanoparticles (Au NPs) were employed to detect trace levels of cannabis biomarkers in saliva. Strong characteristic THC and THC metabolite SERS peaks at 1601 and 1681 cm−1 were obtained despite the moderate interference of biological molecules native to saliva. Urine samples were also analyzed, but they required TLC separation of THC from the urine sample to eliminate the strong influence of urea and other organic molecules. TLC separation of THC from the urine was performed by porous microfluidic channel devices using diatomaceous earth as the stationary phase. The experimental results showed clear separation between urea and THC, and strong THC SERS characteristic peaks. Principal component analysis (PCA) was used to analyze the SERS spectra collected from various THC samples. The spectra in the principal component space were well clustered for each sample type and share very similar scores in the main principal component (PC1), which can serve as the benchmark for THC sensing from complex SERS spectra. Therefore, we proved that portable Raman spectrometers can enable an on-site sensing capability using diatomaceous SERS substrates to detect THC in real biological solutions. This portable THC sensing technology will play pivotal roles in forensic analysis, medical diagnosis, and public health.

Analysis of explosives' precursors by means of a portable Raman spectrometer

2009 ◽  
Author(s):  
Magdalena Del Río Anaya ◽  
Guillermo García-Torales ◽  
Verónica Rodríguez Betancourtt ◽  
Rubén Rodríguez Rojas ◽  
Jorge Flores Núñez
Keyword(s):  
Raman Spectrometer ◽  
Portable Raman
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