An easy to implement approach for laboratories to visualize particle spread during the handling and analysis of drug evidence

Sisco, Edward; Staymates, Matthew E.; Burns, Amber

doi:10.1016/j.forc.2020.100232

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…Initially, the fluorescent material GloGerm™ was used to visually demonstrate contamination of a canine training aid. GloGerm™ was previously used to visualize contamination due to particulate transfer from narcotics [16] and odor/particulate transfer for the TATP POCR [17]. The study then used a series of three chemical tests with DART-MS. First, the study individually tested eight primary containment systems for their ability to prevent odor permeation from the TATP POCR.…”

Section: Introductionmentioning

confidence: 99%

Toward maintaining canine training aid integrity: Visualizing contamination and testing storage materials for a non‐hazardous canine training aid

Gauthier

Riley

Simon

2023

Journal of Forensic Sciences

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Contamination of canine training aids is a pervasive issue that may lead to incorrect canine discrimination of target odors. It is therefore important to properly store training materials to maintain their integrity and efficiency. First, this study demonstrated the potential for contamination using GloGerm™ as a proxy for odor/particulate transfer. Then, eight types of containers were evaluated to determine (1) the ability to prevent odor permeation and (2) the likelihood of maintaining the ab/adsorbed odor. Lastly, a longitudinal study evaluated how the permeation of the target odor changed over time. Analysis occurred using a direct analysis in real‐time mass spectrometer (DART‐MS) to detect triacetone triperoxide (TATP) from the non‐hazardous canine training aid known as the polymer odor capture‐and‐release (POCR) system. Results showed that Mylar and Opsak bags were most effective for short‐term storage, maintaining low levels of ab/adsorption. Over time, the amount of TATP permeating through the primary containers and collecting in a secondary container (i.e., outer packaging) increased at 1 week and decreased thereafter (up to 4 months). The amount of TATP collecting in the primary containers, however, increased up to 1 month and decreased thereafter.

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Section: Introductionmentioning

confidence: 99%

Toward maintaining canine training aid integrity: Visualizing contamination and testing storage materials for a non‐hazardous canine training aid

Gauthier

Riley

Simon

2023

Journal of Forensic Sciences

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“…The handling of drug evidence can lead to transfer of trace particulate onto various laboratory surfaces [Sisco et al 2020a]. In the crime lab, we observed scientists placing barrier paper on the laboratory bench.…”

Section: B-18mentioning

confidence: 99%

Evaluation of occupational exposures to illicit drugs in forensic laboratories.

2023

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“…The initial study herein was designed as a proof of concept to establish the importance of gloves. To demonstrate the general effectiveness of gloves as a barrier, the experiment visualized fluorescent particulates transferred between a training aid, gloves, and a tabletop using a method similar to Sisco et al [9].…”

Section: Introductionmentioning

confidence: 99%

Permeation of human scent through laboratory examination gloves

Gauthier

Riley

Simon

2022

Journal of Forensic Sciences

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It is generally accepted in the canine detection industry that a barrier (such as a glove) should be used between a human and evidence or canine training aids in order to prevent contamination and cross‐contamination as well as protect the handler from hazardous materials. However, no studies exist evaluating this assumption. Further, there is no published literature examining the different types of gloves for their utility in handling evidence or training materials used in canine detection work. This study was the first of its kind to address these gaps in the literature. First, GloGerm™ was used as a proxy for human scent and odor(s)/particulate(s) to visualize potential contamination. Then, three types of gloves (nitrile, two layers of nitrile, latex, and polyethylene) were tested for the permeation of human scent using furfural as a proof of concept, followed by pooled human sweat. Finally, the inherent odor of each glove type was identified. Two analytical techniques were used simultaneously as static and standoff dynamic detection systems, respectively: solid‐phase microextraction–gas chromatography–mass spectrometry (SPME–GC–MS) and direct analysis in real time‐mass spectrometry (DART‐MS). Using a double layer of nitrile gloves was the most effective in preventing furfural permeation from the analytical standard, while a single layer of nitrile prevented furfural from permeating from human sweat up to 2 h. Polyethylene gloves allowed the highest amount of furfural permeation but had no inherent odor detected. Headspace analysis detected two compounds for nitrile gloves and four compounds for latex gloves, but the nitrile compounds had a higher relative abundance.

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An easy to implement approach for laboratories to visualize particle spread during the handling and analysis of drug evidence

Cited by 7 publications

References 19 publications

Toward maintaining canine training aid integrity: Visualizing contamination and testing storage materials for a non‐hazardous canine training aid

Toward maintaining canine training aid integrity: Visualizing contamination and testing storage materials for a non‐hazardous canine training aid

Evaluation of occupational exposures to illicit drugs in forensic laboratories.

Permeation of human scent through laboratory examination gloves

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