Extraction and concentration of vapors from fire debris for forensic purposes: Evaluation of the use of Radiello Passive Air Sampler

Baechler, Simon; Comment, Stéfane; Delémont, Olivier

doi:10.1016/j.talanta.2010.06.052

Cited by 21 publications

(9 citation statements)

References 10 publications

(14 reference statements)

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“…Indeed, substantial particle plumes could be seen emanating from the plant during deployment and collection. The Radiello Ⓡ diffusive body of the PAS has a reported average pore size of 25 ± 5 m and a wall thickness of 1.7 mm (Baechler et al 2010, Puchalski et al 2011, and hence is not likely to allow the passage of PBM.…”

Section: Concentration Gradients In the Vicinity Of Npri Sourcesmentioning

confidence: 99%

Identifying and evaluating urban mercury emission sources through passive sampler-based mapping of atmospheric concentrations

McLagan

Hussain

Huang

et al. 2018

Environ. Res. Lett.

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Beyond emissions from coal-fired power generation, urban sources of mercury (Hg) to the atmosphere, especially minor fugitive sources, are relatively poorly characterized. To identify urban sources of fugitive Hg emissions, passive air samplers (PASs) were deployed for periods of 4-6 weeks in the summer of 2016 at 145 sites across the Greater Toronto Area (GTA). PASs were also deployed along transects of increasing distance from five sites listed as Hg sources in the National Pollution Release Inventory (NPRI) within or near the GTA. Mean gaseous Hg concentrations in downtown Toronto (1.77 ± 0.28 ng m −3 ) are slightly, but significantly elevated relative to other parts of the GTA (1.42 ± 0.20 ng m −3 ). Similarly, concentrations at sites close to waste/recycling (1.61 ± 0.22 ng m −3 ) and hospitals/dental facilities (1.63 ± 0.21 ng m −3 ) are significantly higher than at sites presumably distant from potential sources (1.37 ± 0.20 ng m −3 ). Gaseous Hg concentrations are elevated near four of five NPRI source sites, but not near a wastewater treatment plant. Measured or predicted concentrations (using extrapolated transect relationships) close to known Hg sources do not correlate with reported NPRI emissions. For example, the Hg disposal company Aevitas Inc. has the lowest reported NPRI emissions (0.11 kg yr −1 ) among the five sources, but measured (12.3 ng m −3 ) and predicted (60.0 ng m −3 ) concentrations outside the facility are the highest. The PAS's ability to precisely and accurately discriminate small differences in gaseous Hg concentration (<0.2 ng m −3 ) at and near global background concentrations enables the mapping of the spatial concentration variability and the identification of fugitive Hg emission sources.

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Section: Concentration Gradients In the Vicinity Of Npri Sourcesmentioning

confidence: 99%

Identifying and evaluating urban mercury emission sources through passive sampler-based mapping of atmospheric concentrations

McLagan

Hussain

Huang

et al. 2018

Environ. Res. Lett.

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“…Schematic of the Radiello diffusive sampler from the literature , copyright (2008) with permission from Elsevier…”

Section: Modified Sample Preparation Techniques For Fire Debris Analysismentioning

confidence: 99%

Sample preparation for the analysis of fire debris – Past and present

Kerr

2018

J of Separation Science

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Identification of ignitable liquids from fire debris is such a major part of an arson investigation that much time and effort has gone into advancing sample preparation techniques to capture complicated and unexpected hydrocarbon compounds. Advancements in sample preparation have been made in order to account for biodegradation of commonly used accelerants, rarely encountered compounds, such as vegetable oils, biodiesel, and alcohols. Improvements have also been made to manage interference from the sample matrix, particularly with regards to new materials. This paper is a review of the sample preparation techniques that are foundational to fire debris analysis as well as recent advances. Also explored are modifications to the traditional sample preparation methods to accommodate the analysis of environmental samples (soil and water), and the presence of vegetable oils and biofuels on the fire scene.

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“…Significant changes continue to occur in the areas of sample preparation and data analysis (49). Several academic research groups have also made significant progress in automated interpretation of GC/MS data and the classification models for comparing questioned samples with reference materials and classes defined by ASTM (American Society for Testing and Materials) (e.g.…”

Section: Real-time Drug Monitoring and Ambient Sampling Are Not New Imentioning

confidence: 99%

Forensic Mass Spectrometry

Hoffmann¹,

Jackson

2015

Annual Rev. Anal. Chem.

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Developments in forensic mass spectrometry tend to follow, rather than lead, the developments in other disciplines. Examples of techniques having forensic potential born independently of forensic applications include ambient ionization, imaging mass spectrometry, isotope ratio mass spectrometry, portable mass spectrometers, and hyphenated chromatography-mass spectrometry instruments, to name a few. Forensic science has the potential to benefit enormously from developments that are funded by other means, if only the infrastructure and personnel existed to adopt, validate, and implement the new technologies into casework. Perhaps one unique area in which forensic science is at the cutting edge is in the area of chemometrics and the determination of likelihood ratios for the evaluation of the weight of evidence. Such statistical techniques have been developed most extensively for ignitable-liquid residue analyses and isotope ratio analysis. This review attempts to capture the trends, motivating forces, and likely impact of developing areas of forensic mass spectrometry, with the caveat that none of this research is likely to have any real impact in the forensic community unless: (a) The instruments developed are turned into robust black boxes with red and green lights for positives and negatives, respectively, or (b) there are PhD graduates in the workforce who can help adopt these sophisticated techniques.

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Extraction and concentration of vapors from fire debris for forensic purposes: Evaluation of the use of Radiello Passive Air Sampler

Cited by 21 publications

References 10 publications

Identifying and evaluating urban mercury emission sources through passive sampler-based mapping of atmospheric concentrations

Identifying and evaluating urban mercury emission sources through passive sampler-based mapping of atmospheric concentrations

Sample preparation for the analysis of fire debris – Past and present

Forensic Mass Spectrometry

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