Detection of gasoline on suspects' hands: Study of different sampling alternatives.

摘要: Abstract Arsonists may use ignitable liquids to start, accelerate and amplify fires. The sampling of volatiles present on the hands suspected arsonists is therefore sometimes carried out in course investigation (possible) deliberate Several collection protocols have been proposed, relying concentration by transfer PVC gloves further passive headspace extraction with Activated Charcoal Strips (ACS). Previous research findings assessing Carbon Cloth (ACC) – initially developed for adsorption gas military applications opens path new perspectives regarding liquid residues general, particular. Five alternative methods (four ACC one ACS) were considered gasoline traces their subsequent analysis chromatography mass spectrometry. Gasoline was deposited onto palms volunteers study differences between method using ACS those ACC. For latter, either volunteer placed nylon bags an palm or suspended, or, powder-free latex used, a separate extraction, glove bag suspended. results showed that background contamination not distinguishable ability comparable. two deposition directly surface where significantly higher capacity than other methods, provided direct contact contaminated zone. three main factors affected hands: distance skin sorbent (ACC case sorbent, exposure time, space hand (i.e. volume). This through It corroborates perceived potential volatile compounds, particularly fire debris purposes. While experiments focused hands, provide valuable information more general way debris.