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Updated: Oct 12, 2025

Research and Development of High-performance Explosives

Research and Development of High-performance Explosives

Published on: February 20, 2016

Two-temperature preparation method for PDMS-based canine training aids for explosives.

William MacCrehan¹, Mimy Young¹, Michele Schantz¹

¹Material Measurement Laboratory, National Institute of Standards and Technology, Gaithersburg, MD, USA.

Forensic Chemistry (Amsterdam, Netherlands)

|November 25, 2021

Summary

This summary is machine-generated.

This study introduces a two-temperature method for canine explosive detection training aids. This technique enhances vapor capture for less volatile compounds like TNT, improving scent detection accuracy.

Keywords:

2, 4-DNT 2, 6-DNT Canine training aid PDMS odor-capture-and-release Polydimethylsiloxane (PDMS)TNT

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Area of Science:

Forensic Science
Materials Science
Analytical Chemistry

Background:

Canine detection relies on training aids that release explosive vapors.
Polydimethylsiloxane (PDMS) is used for vapor capture and release.
Enhancing vapor capture for less volatile explosives is crucial for effective training.

Purpose of the Study:

To improve the efficacy of canine training aids for detecting less volatile explosives.
To investigate a two-temperature preparation method for enhanced vapor capture.
To evaluate the performance of these aids in canine trials.

Main Methods:

Utilizing a two-temperature approach during training aid preparation: elevated temperature for the target explosive and a cool temperature for the PDMS adsorbent.
Employing SPME (solid-phase microextraction) headspace analysis for TNT detection.
Conducting canine trials to assess training aid effectiveness with TNT and its impurities (2,4-DNT, 2,6-DNT).
Implementing a thermal pretreatment to reduce non-target odors in PDMS.

Main Results:

The two-temperature method successfully enhanced vapor capture for the low volatility explosive TNT.
Canine trials demonstrated the effectiveness of the prepared training aids for TNT and its impurities.
SPME analysis confirmed the enhanced odor profile production.

Conclusions:

The two-temperature preparation strategy is effective for creating canine training aids for explosives, particularly less volatile ones like TNT.
This method improves the sensitivity and accuracy of canine explosive detection.
Thermal pretreatment offers a way to minimize interference from non-target odors.