Treatment of Glass Sampling Containers to Determine Trace Amounts of Accelerants in Fire Samples

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00007064%3AK02__%2F24%3AN0000046" target="_blank" >RIV/00007064:K02__/24:N0000046 - isvavai.cz</a>

Result on the web

<a href="https://scoop-cms.s3.amazonaws.com/55dd7640ca2f3ade448b457d/documents/august-ewj-24.pdf" target="_blank" >https://scoop-cms.s3.amazonaws.com/55dd7640ca2f3ade448b457d/documents/august-ewj-24.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Treatment of Glass Sampling Containers to Determine Trace Amounts of Accelerants in Fire Samples

Original language description

Gas chromatography is be used to prove the presence of small amounts of organ-ics trapped on solid samples or in liquid samples from fires and it serves as evi-dence of the presence of traces of flammable liquids used as substances that sup-port combustion (fire accelerants). Demonstrating the presence of traces of gaso-line or diesel fuel can significantly support the hypothesis that a fire was started intentionally. Recently, with the development of gas chromatography instrumen-tation, the sensitivity of the measurement increases and it is possible to measure lower concentrations. Therefore, it is important to collect the sample correctly, use clean sample containers, collection tools and equipment and prevent contamina-tion of the sample during transport to the laboratory. This places increased de-mands on the quality of the collected samples and their packaging – sample con-tainers. The contribution deals with the testing of the cleanness of glass sample containers and suggests their cleaning procedures so that their contaminants do not affect the determination of the presence of traces of gasoline or diesel in sam-ples from the fire scene. Gas chromatography with mass spectrometry and solid phase micro extraction (GCMS-SPME) was used to detect contamination in new preserving jar with TWIST OFF caps. By testing different types of lids from dif-ferent manufacturers it was found that all of them are already contaminated with similar substances to varying degrees. Various methods of cleaning were tried, namely burning, using sorbent materials and cleaning with solvents. Based on these results, a procedure for their cleaning was proposed.

Czech name

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Czech description

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Type

J_ost - Miscellaneous article in a specialist periodical

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

2024

Confidentiality

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

Name of the periodical

The Expert Witness: The Journal for Instructing Professionals & Expert Witnesses

ISSN

2397-2769

e-ISSN

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Volume of the periodical

56

Issue of the periodical within the volume

srpen 2024

Country of publishing house

GB - UNITED KINGDOM

Number of pages

2

Pages from-to

36-37

UT code for WoS article

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EID of the result in the Scopus database

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