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- E-ISSN 2288-8985
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Introduction of a novel swabbing material of a wiper and establishment of an optimal method for the collection of organic explosive residues
Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2017, v.30 no.6, pp.319-328
https://doi.org/10.5806/AST.2017.30.6.319
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(2017). Introduction of a novel swabbing material of a wiper and establishment of an optimal method for the collection of organic explosive residues. Analytical Science and Technology, 30(6), 319-328, https://doi.org/10.5806/AST.2017.30.6.319
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Abstract
The identification of explosive residues on specimens obtained from an explosion event is a crucial factor for assessing the cause of the explosion. In order to detect the components of explosives, the explosive residues deposited on surfaces are commonly extracted using swabbing materials pre-wetted with an organic solvent. The residues are then analyzed with analytical instruments such as LC/MS and CE/MS. Most conventionally used swabbing media such as cotton swabs or cotton tip swabs seem unsuitable for extracting explosive residues from the surface of a large area of clothes because the swabbing materials tend to be damaged easily, and because only a relatively small amount of explosives is collected. To overcome these problems, we have introduced a novel wiper (215 × 210 mm, single layer, Yuhan-Kimberly, Republic of Korea) as a swabbing material to recover representative organic explosives, namely, TNT, RDX, tetryl, HMX, PETN, and NG, from a large area of clothes. Different sides of the wiper, which was folded in half five times, was used to swab the surface of a clothing. We compared this novel wiper with a cotton swab and a cotton tip swab in terms of the recovery efficiency for the aforementioned organic explosives by pre-wetting with methanol, acetone, and acetonitrile, respectively. We identified that this novel wiper collected a significantly higher amount of organic explosive residues than a cotton swab or a cotton tip swab when using methanol as an extracting solvent.
- keywords
- swabbing material, organic explosives, wiper, cotton swab, cotton tip swab
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