Single-use rubber gloves as evidence sample after a cyclosarin attack

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60162694%3AG45__%2F23%3A00558129" target="_blank" >RIV/60162694:G45__/23:00558129 - isvavai.cz</a>

Result on the web

<a href="https://isss2020.si/index.php/programme/programme-details#modal_62bd9e9cbfadd9280" target="_blank" >https://isss2020.si/index.php/programme/programme-details#modal_62bd9e9cbfadd9280</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Single-use rubber gloves as evidence sample after a cyclosarin attack

Original language description

Videos made after the chemical attacks in Syria show that medical teams did not wear any protective gear, except for sporadic use of single-use gloves and surgical masks. No special personal protective equipment against CBRN threats was noticed [1]. Getting to the war zone after the attack for evidence sampling can be impossible in real time. Single-use gloves do not provide sufficient protection for the wearer, however, it has not yet been studied whether they can be used as samples to confirm an attack by toxic substances. The military mobile laboratory is a preforensic team that can be deployed quickly to identify toxic substances in various samples. In the study, 3 types of disposable gloves were studied as samples - nitrile, latex and vinyl. The contaminants were the nerve agent cyclosarin (GF) and its precursor methylphosphonyl dichloride (DC). Standard solvents used in mobile laboratories - acetone, acetonitrile, dichloromethane, ethyl acetate, hexane and methanol - were used as extractants. The optimal extraction method and extraction time were monitored. Furthermore, the extraction efficiency of individual solvents was studied, as well as the extraction of other substances from the matrix, which would interfere in the chromatogram. The time after contamination, for which the analyte can still be found in the sample, was observed. The outputs show different results for each material, as well as for different extractants. In latex gloves, it was possible to detect GF using 5 solvents up to 300 min after contamination. The best extractants for nitrile gloves were dichloromethane and acetone, which extracted GF up to 4 days after contamination. For vinyl gloves, the analyte could be traced in the sample 6 days after contamination using hexane, acetonitrile and ethyl acetate. The solvents extracting substances from the matrix were also eliminated when selecting the optimal extractant. Finally, a sampling scenario was simulated. The sampling team took the sample according to their SOP 2 days after the incident and the effect of handling and packaging on the subsequent laboratory results was studied.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

10406 - Analytical chemistry

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů