Determining the Method Threshold of Identification via Gas Chromatography-Mass Spectrometry of Weathered Gasoline Extracted from Burnt Nylon Carpet.

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 Sci

authors

Hondrogiannis EM,Newton C,Alibozek R

doi

10.1111/1556-4029.13983

subject

Has Abstract

pub_date

2019-07-01 00:00:00

pages

1160-1168

issue

4

eissn

0022-1198

issn

1556-4029

journal_volume

64

pub_type

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