scholarly journals Fiber Optic Coupled Raman Based Detection of Hazardous Liquids Concealed in Commercial Products

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Michael L. Ramírez-Cedeño ◽  
Natalie Gaensbauer ◽  
Hilsamar Félix-Rivera ◽  
William Ortiz-Rivera ◽  
Leonardo Pacheco-Londoño ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Raman Spectroscopy ◽  
Fiber Optic ◽  
Hazardous Materials ◽  
Chemical Warfare Agent ◽  
Chemical Warfare ◽  
Consumer Products ◽  
Algorithm Analysis ◽  
Triethyl Phosphate ◽  
Industrial Compounds

Raman spectroscopy has been widely proposed as a technique to nondestructively and noninvasively interrogate the contents of glass and plastic bottles. In this work, Raman spectroscopy is used in a concealed threat scenario where hazardous liquids have been intentionally mixed with common consumer products to mask its appearance or spectra. The hazardous liquids under consideration included the chemical warfare agent (CWA) simulant triethyl phosphate (TEP), hydrogen peroxide, and acetone as representative of toxic industrial compounds (TICs). Fiber optic coupled Raman spectroscopy (FOCRS) and partial least squares (PLS) algorithm analysis were used to quantify hydrogen peroxide in whiskey, acetone in perfume, and TEP in colored beverages. Spectral data was used to evaluate if the hazardous liquids can be successfully concealed in consumer products. Results demonstrated that FOC-RS systems were able to discriminate between nonhazardous consumer products and mixtures with hazardous materials at concentrations lower than 5%.

MEMS-Based Gas Chromatography Column for the Analysis of Chemical Warfare Agent (CWA) Simulates

2013 ◽  
Vol 475-476 ◽  
pp. 1294-1298
Author(s):  
Yi Li ◽  
Xiao Song Du ◽  
Yang Wang ◽  
Hui Ling Tai ◽  
Dong Qiu ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Chemical Warfare Agent ◽  
Micro Electro Mechanical System ◽  
Chemical Warfare ◽  
Triethyl Phosphate ◽  
Deep Reactive Ion Etching ◽  
Chromatography Column ◽  
Three Samples ◽  
Mems Technology ◽  
Efficient Column

In this report the gas chromatography column was fabricated base on micro electro mechanical system (MEMS) technology. It tries to find an equilibrium point which can fast detect CWA stimulants with efficient column separation. Under deep reactive-ion etching (DRIE) process, a 1m length, 90 um thickness and 300 um height which form 3:1high-aspect-ratio, MEMS-based silicon GC column was fabricated. The GC column was coated with 95%Methyl 5% Phenyl Polysilozane (DB-5) as the stationary phase. Dimethyl methyl phosphonate (DMMP), Triethyl phosphate (TEP) and Methy salicylate were used for CWA simulations. All of these three samples can be separated less than 90s with reasonable column efficiency.

scholarly journals Waveguide-enhanced Raman spectroscopy of trace chemical warfare agent simulants

2018 ◽  
Vol 43 (19) ◽  
pp. 4803 ◽  
Author(s):  
Nathan F. Tyndall ◽  
Todd H. Stievater ◽  
Dmitry A. Kozak ◽  
Kee Koo ◽  
R. Andrew McGill ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Chemical Warfare Agent ◽  
Chemical Warfare

scholarly journals Decontamination of Chemical Warfare Agent Simulants using Vapor-phase Hydrogen Peroxide

2014 ◽  
Vol 52 (3) ◽  
pp. 360-365 ◽  
Author(s):  
Yun-Ki Kim ◽  
Hyun-Sang Yoo ◽  
Min-Cheol Kim ◽  
Hyun-Chul Hwang ◽  
Sam-Gon Ryu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Vapor Phase ◽  
Chemical Warfare Agent ◽  
Chemical Warfare

Demonstration of spread-on peel-off consumer products for sampling surfaces contaminated with pesticides and chemical warfare agent signatures

2014 ◽  
Vol 241 ◽  
pp. 7-14 ◽  
Author(s):  
Deborah L. Behringer ◽  
Deborah L. Smith ◽  
Vanessa R. Katona ◽  
Alan T. Lewis ◽  
Laura A. Hernon-Kenny ◽  
...  
Keyword(s):  
Chemical Warfare Agent ◽  
Chemical Warfare ◽  
Consumer Products

VIBRATIONAL SPECTROSCOPY OF CHEMICAL AGENTS SIMULANTS, DEGRADATION PRODUCTS OF CHEMICAL AGENTS AND TOXIC INDUSTRIAL COMPOUNDS

2007 ◽  
Vol 17 (04) ◽  
pp. 827-843 ◽  
Author(s):  
SAMUEL P. HERNÁNDEZ-RIVERA ◽  
LEONARDO C. PACHECO-LONDOÑO ◽  
OLIVA M. PRIMERA-PEDROZO ◽  
ORLANDO RUIZ ◽  
YADIRA SOTO-FELICIANO ◽  
...  
Keyword(s):  
Fiber Optics ◽  
Vibrational Spectroscopy ◽  
Degradation Products ◽  
Grazing Angle ◽  
Chemical Warfare Agents ◽  
Chemical Warfare Agent ◽  
Chemical Warfare ◽  
Chemical Agents ◽  
Warfare Agents ◽  
Industrial Compounds

This paper focuses on the measurement of spectroscopic signatures of Chemical Warfare Agent Simulants (CWAS), degradation products of chemical agents and Toxic Industrial Compounds (TIC) using vibrational spectroscopy. Raman Microscopy, Fourier Transform Infrared Spectroscopy in liquid and gas phase and Fiber Optics Coupled-Grazing Angle Probe-FTIR were used to characterize the spectroscopic information of target threat agents. Ab initio chemical calculations of energy minimization and FTIR spectra of Chemical Warfare Agents were accompanied by Cluster Analysis to correlate spectral information of real agents and simulants.

Heat Exchange During Encapsulation in a Chemical Warfare Agent Protective Patient Wrap in Four Hot Environments

1987 ◽  
Author(s):  
Lou A. Stephenson ◽  
Margaret A. Kolka ◽  
Anne E. Allan ◽  
William R. Santee
Keyword(s):  
Heat Exchange ◽  
Chemical Warfare Agent ◽  
Chemical Warfare ◽  
Hot Environments

Evaluation of Silver-Exchanged Zeolites Under Development by University of Maine for Chemical Warfare Agent Decontamination Applications

2007 ◽  
Author(s):  
Mark D. Brickhouse ◽  
Teri A. Lalain ◽  
Terrence G. D'Onofrio ◽  
Lawrence R. Procell ◽  
Zachary B. Zander
Keyword(s):  
Chemical Warfare Agent ◽  
Chemical Warfare
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