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Search Publications by: Jeffrey Lawrence (Fed)

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Displaying 1 - 14 of 14

Improving Particle Collection Efficiency of Sampling Wipes used for Trace Chemical Detection

December 31, 2021
Author(s)
J Greg Gillen, Jeffrey Lawrence, Edward Sisco, Matthew E. Staymates, Liz Robinson, Jennifer R. Verkouteren, Alexander Bulk
Improvement of the particle collection efficiency of sampling wipes is desirable for optimizing the performance of many wipe-based chemical analysis techniques used for trace chemical screening applications. In this note, commercially available Teflon

Discriminative potential of ion mobility spectrometry for the detection of fentanyl and fentanyl analogues relative to confounding environmental interferents

September 27, 2019
Author(s)
Thomas Forbes, Jeffrey Lawrence, Jennifer R. Verkouteren, R. Michael Verkouteren
The opioid crisis and emergence of fentanyl, fentanyl analogues, and other synthetic opioids has highlighted the need for sensitive and robust detection for interdiction at screening points, notably vehicles at border crossings and packages at postal

A Standards and Measurement Infrastructure for Calibration, Verification and Optimization of Trace Explosives Detection Systems

April 15, 2019
Author(s)
John G. Gillen, Jennifer R. Verkouteren, R M. Verkouteren, Marcela N. Najarro, Edward R. Sisco, Matthew E. Staymates, Jessica L. Staymates, Robert A. Fletcher, Jeffrey A. Lawrence, Elizabeth L. Robinson, Alexander T. Bulk, Joseph A. Bennett, Shinichiro Muramoto, Thomas P. Forbes
Current national priorities in homeland security have led to an unprecedented level of utilization of explosives trace detection (ETD) systems for counterterrorism and law enforcement. Despite the widespread deployment of ETD instruments at airports

ASTM E2677: Web-based International Standard on Limit of Detection for Explosive Trace Detectors (and More) - Opioids and Ozone

February 12, 2019
Author(s)
R M. Verkouteren, Nathanael A. Heckert, Stefan D. Leigh, Edward R. Sisco, James E. Norris, Jeffrey A. Lawrence, Amber Burns
The performance characteristics of explosive and narcotic trace detectors are mission-critical to agencies worldwide that are charged with protection of the public, defense for mass transit and infrastructure, and the safety of first responders. Commercial

Rapid Detection of Fentanyl, Fentanyl Analogues, and Opioids for on-Site or Laboratory Based Drug Seizure Screening using Thermal Desorption DART-MS and Ion Mobility Spectrometry

April 27, 2017
Author(s)
Edward Sisco, Jennifer R. Verkouteren, Jessica L. Staymates, Jeffrey Lawrence
Fentanyl and fentanyl analogues represent a current and emerging threat in the United States as pure illicit narcotics and as cutting agents with heroin. Because of their extreme potency, methods to safely and rapidly detect these compounds are of high

Standardized Measurements of Collection Efficiency from Wipe-Sampling of Trace Explosives

April 10, 2017
Author(s)
Jennifer R. Verkouteren, Jeffrey A. Lawrence, Matthew E. Staymates, Edward R. Sisco
One of the limiting steps to detecting traces of explosives at screening venues is effective collection of the sample. Wipe-sampling is the most common procedure for collecting traces of explosives, and standardized measurements of collection efficiency

Quantifying Stability of Trace Explosives under Different Environmental Conditions

April 1, 2017
Author(s)
Edward R. Sisco, Marcela N. Najarro, Daniel V. Samarov, Jeffrey A. Lawrence
This work investigates the stability of trace deposits of six explosives (ETN, PETN, RDX, HMX, TNT, and Tetryl) to determine environmental stabilities and lifetimes. Explosives were inkjet printed directly onto PTFE coated fiberglass substrates and exposed

The effect of reusing wipes for particle collection

November 4, 2015
Author(s)
Jessica L. Staymates, Matthew E. Staymates, Jeffrey A. Lawrence
This work addresses the need for a method to measure the collection efficiency performance of surface wipe materials as a function of wipe reuse number. The primary purpose of this study is to investigate the effect of wipe reuse, i.e. the number of times