Posted in Gas Chromatography on Aug 24, 2007
These days gas chromatography (GC) is one of the primary analytical techniques used in every forensic laboratory. GC is widely used by forensic scientists – from analysis of body fluids for the presence of illegal substances, to testing of fiber and blood from a crime scene, and to detect residue from explosives. Yet scientists from Ohio University explored another application of gas chromatography with differential mobility spectrometry as a low cost, onsite detection method for ignitable liquids.
According to the US Fire Administration, arson is the leading cause of fires and the second leading cause of deaths and injures, and that’s why arson investigation is of forensic significance for the criminal justice system.
Commercially available fuels or solvents that are mixtures consisting of hundreds of components are typically used to start a fire. Analysis becomes very difficult because ignitable liquids consist of same or similar components at different concentrations, in addition, fire may evaporate some of the components and thus altering the composition of residual ignitable liquids found in fire debris.
Gas chromatography – mass spectrometry (GC/MS) is a well established method for analysis of ignitable liquids; however, Yao Lu and Peter B. Harrington proposed a gas chromatography / differential mobility spectrometry (GC-DMS) method. The duo tested a variety of commercially available petroleum-based ignitable liquids and showed that two-way GC-DMS data provides more information for classification and better prediction results than either chromatograms or DMS spectra.
References: “Forensic Application of Gas Chromatography-Differential Mobility Spectrometry with Two-Way Classification of Ignitable Liquids from Fire Debris”, Yao Lu and Peter B. Harrington, Analytical Chemistry, 2007, DOI:10.1021/ac0707028
Superb site you have here but I was curious if you knew of any forums that cover the same
topics discussed here? I’d really love to
be a part of online community where I can get comments from other knowledgeable individuals
that share the same interest. If you have any suggestions,
please let me know. Thanks!
Sir.
I’m a forensic analyst in the Nigerian Police Force and I will like u to furnished me with materials (journals for a beginner in Forensic analysis).
I shall be greatful if my request is granted and given speedy consideration.
Thanks in anticipation for your kind response
1.what is the diference b/n gss chromato graphy and liqiud chromato chromato graphy?
2.what is the diference b/n liqiud-liqiud chromato graphy and liqiud-bonded phase chromatography?
hi, i was searching for an article and i get that article frm this link.thanx
i need more infomation
To know more facts in the world of analytical science
There is a premier event taking place September 9-11 Increase Productivity And Throughput Via Fast Separations And Advanced Chromatographic Techniques, contacts http://www.lcgcevent.com, michael.berube@cbinet.com, 781-939-2485
Hi Chemist, where are you nowaday???? a very long time no article from you, there are still some people who are looking for your usefull articles. come back soon & make this blog alive again
regards
Great Blog. I linked you :)
Quite interesting!
As stated by the author, GC and HPLC are very common separation tools.
And the blog is named by justchromatography,but have you heard about High Speed Countercurrent Chromatography? It is a liuqid-liquid Chromatography, which uses no solid support.
If you need more info,pls feel free to contact me.
register your blog in http://www.dignow.org