Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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

Published

Author(s)

J Greg Gillen, Jeffrey Lawrence, Edward Sisco, Matthew E. Staymates, Liz Robinson, Jennifer R. Verkouteren, Alexander Bulk

Abstract

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 coated fiberglass and calendered Nomex sampling wipes were modified by mechanically scoring the wipe surface to produce topography that promoted enhanced and localized particle collection. Wipe surface modifications improved particle collection efficiency, relative to unmodified wipes, by factors of 3 to 13 depending on sampling conditions, wipe type, and surface sampled. Improvements were demonstrated for both model polystyrene latex microspheres and inkjet printed explosive particles. The modifications also concentrated particles into pre-defined locations on the wipe which can be engineered to ensure maximum overlap with the thermal desorber of a trace contraband detection system allowing for more effective analysis of collected trace residues.
Citation
Analytical Methods
Volume
14

Keywords

trace detection, wipe, particle collection efficiency

Citation

Gillen, J. , Lawrence, J. , Sisco, E. , Staymates, M. , Robinson, L. , Verkouteren, J. and Bulk, A. (2021), Improving Particle Collection Efficiency of Sampling Wipes used for Trace Chemical Detection, Analytical Methods, [online], https://doi.org/10.1039/D1AY01609A, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933061 (Accessed June 14, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created December 31, 2021, Updated April 5, 2023