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Evaluation of the self-heating tendency of vegetable oils by differential scanning calorimetry.
MedLine Citation:
PMID:  18798771     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
The evaluation of the self-heating propensity of a vegetable (or animal) oil may be of significant importance during the investigation of a fire. Unfortunately, iodine value and gas chromatographic-mass spectrometric analysis do not lead to meaningful results in this regard. To the contrary, differential scanning calorimetry (DSC), which does not measure the chemical composition of the oil, but rather its thermodynamic behavior, produces valuable results. After a thorough literature review on the autooxidation of vegetable oils, several oils with different self-heating tendencies were analyzed using a Mettler-Toledo differential scanning calorimeter DSC 25 between 40 degrees C and 500 degrees C. Analyses were carried out both under air and nitrogen atmosphere to identify the phenomena due to autooxidation reactions. Using DSC, it was possible to observe the induction period of the oil (when available), the three different exothermic events, and the autoignition temperature (relatively independent of the oil type).
Authors:
Amélie Baylon; Eric Stauffer; Olivier Delémont
Publication Detail:
Type:  Journal Article     Date:  2008-09-16
Journal Detail:
Title:  Journal of forensic sciences     Volume:  53     ISSN:  1556-4029     ISO Abbreviation:  J. Forensic Sci.     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-11-21     Completed Date:  2009-03-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375370     Medline TA:  J Forensic Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1334-43     Citation Subset:  -    
Affiliation:
Institut de Police Scientifique, School of Criminal Sciences, University of Lausanne, CH-1015 Lausanne, Switzerland.
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