Gas Chromatography Coupled with Ion Trap Mass Spectrometry (GC-MS and GC-MS-MS) - for Arson Debris Analysis - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Gas Chromatography Coupled with Ion Trap Mass Spectrometry (GC-MS and GC-MS-MS) - for Arson Debris Analysis write by Betty-Jane De Vos. This book was released on 2013. Gas Chromatography Coupled with Ion Trap Mass Spectrometry (GC-MS and GC-MS-MS) - for Arson Debris Analysis available in PDF, EPUB and Kindle. Gas chromatography - mass spectrometry (GC-MS) is an established instrumental technique used for the analysis of fire debris for accelerant detection. However, matrix problems, such as pyrolysis product interference, are still encountered. These interferences often lead to inconclusive interpretation of the chromatographic results. This study describes methods for analysing arson accelerants using gas chromatography coupled with ion trap mass spectrometry. The latter technique lends itself to both conventional (GC-MS) as well as tandem mass spectrometry (GC-MS-MS). Since petrol (gasoline) is one of the more common distillate blends used by arsonists, especially in South Africa, the identification of petrol in fire debris samples was investigated. In order to overcome pyrolysis product interference and improve detection selectivity of the aromatic hydrocarbons in petrol residues, tandem mass spectrometry was used in combination with capillary gas chromatography. The added parameter of the third dimension of selectivity proved to be superior to conventional GC-MS in obtaining characteristic aromatic hydrocarbon profiles for petrol without interference from pyrolysis artefacts.
Gas Chromatography Coupled with Ion Trap Mass Spectrometry(GC-MS and GC-MS-MS) for Arson Debris Analysis
Gas Chromatography Coupled with Ion Trap Mass Spectrometry(GC-MS and GC-MS-MS) for Arson Debris Analysis - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Gas Chromatography Coupled with Ion Trap Mass Spectrometry(GC-MS and GC-MS-MS) for Arson Debris Analysis write by Betty-Jayne De Vos. This book was released on 2005. Gas Chromatography Coupled with Ion Trap Mass Spectrometry(GC-MS and GC-MS-MS) for Arson Debris Analysis available in PDF, EPUB and Kindle.
Introduction to GC-MS Coupling
Introduction to GC-MS Coupling - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Introduction to GC-MS Coupling write by Stphane Bouchonnet. This book was released on 2013-02-20. Introduction to GC-MS Coupling available in PDF, EPUB and Kindle. Although GC-MS (gas chromatography-mass spectrometry) finds applications in fields as diverse as the food processing industry, medicine, pharmacology, and environmental analysis, the few works that are dedicated to this use of mass spectrometry are generally highly complex and theoretical. Emphasizing the practical aspects of GC-MS, without neglect
A Survey on the Interpretive GC/MS Analysis of Fire Debris
A Survey on the Interpretive GC/MS Analysis of Fire Debris - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook A Survey on the Interpretive GC/MS Analysis of Fire Debris write by Anthony Thomas Parks. This book was released on 2018. A Survey on the Interpretive GC/MS Analysis of Fire Debris available in PDF, EPUB and Kindle. The practice of arson analysis in a forensic science laboratory is based upon detecting the presence of ignitable liquids. If an ignitable liquid is present, it is suggestive of arson; if no ignitable liquid is found an arson claim is more difficult to assert. Ignitable liquids are detected using gas chromatography coupled with mass spectrometry. Instrumental results from a GC/MS can display components of an ignitable liquid but an analyst needs to make the final decision. Even with correct instrumentation and suggested guidelines, ignitable liquid analysis can be subjective and based upon the analysts' education and experience. To better understand the interpretive practices of the fire debris analysis community, a survey consisting of reference samples, mixture standards, and multiple unknowns was created in consultation with the Los Angeles Police Department Arson Unit. The samples consisted of different substrates with varying classes and volumes of ignitable liquid. They were created using a destructive distillation method first developed by the State of Florida Bureau of Forensic Fire and Explosives Analysis. Extraction of the samples was completed using a carbon strip to perform passive headspace absorption following the ASTM E 1412 method. The samples were analyzed with a GC/MS following National Commission on Forensic Science parameters. To maintain confidentiality, participant responses are stripped of identifiers and the results of the survey, details about the procedure, and discussions will be presented.
Analysis of Fire Debris Samples by Gas Chromatography/mass Spectrometry (GC-MS).
Analysis of Fire Debris Samples by Gas Chromatography/mass Spectrometry (GC-MS). - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Analysis of Fire Debris Samples by Gas Chromatography/mass Spectrometry (GC-MS). write by Jack Nowicki. This book was released on 1991. Analysis of Fire Debris Samples by Gas Chromatography/mass Spectrometry (GC-MS). available in PDF, EPUB and Kindle.
