Abstract:
:The Organization of Scientific Area Committees defines threshold of identification as the minimum concentration of ignitable liquid identifiable from gas chromatographic-mass spectrometry data using accepted pattern identification criteria. We propose a method for determining this threshold for gasoline based on base peak to qualifier ratios of six compounds. The ion ratios were established for each compound in the neat gasoline. These ratios were then compared to those obtained for gasoline and 98% weathered gasoline both spiked onto burnt nylon carpet at 20 ppt down 0.50 ppt, and recovered from the carpet using headspace extraction (ASTM 1412). Identification was confirmed if the compounds' ion ratios fell within ±25% of that in the neat sample. We found that ion ratios for all samples were acceptable for six compounds at 1.60 and 0.80 ppt for extracted neat and extracted 98% weathered gasoline, respectively, illustrating potential for incorporating into Quality Assurance Programs.
journal_name
J Forensic Scijournal_title
Journal of forensic sciencesauthors
Hondrogiannis EM,Newton C,Alibozek Rdoi
10.1111/1556-4029.13983subject
Has Abstractpub_date
2019-07-01 00:00:00pages
1160-1168issue
4eissn
0022-1198issn
1556-4029journal_volume
64pub_type
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