The sampling of ignitable liquids on suspects’ hands

Aplicação Da Fluidodinâmica Computacional (Cfd) E Análise De Acelerantes Na Investigação De Incêndio

“…Quando um incêndio é iniciado deliberadamente, os incendiários usam líquidos inflamáveis que derramam sobre o local para ajudar dar início ao fogo, propagar e assim acelerar a destruição. 11 Um acelerante é qualquer combustível ou oxidante, muitas vezes um líquido inflamável, usado para iniciar um incêndio, aumentar a taxa de crescimento e acelerar a propagação do fogo. 12 Os acelerantes podem ser encontrados em qualquer estado físico: gás, líquido ou sólido.…”

Field test kits for collection of ignitable liquids and ignitable liquid residues used by the NSW fire scene investigators

“…The spiking volume of 200 µL represents approximately 4 normal-sized drops of liquid, and was selected as an arbitrary amount based on results of previous studies [2][3][4]. The procedure for collection of ILR from hands was validated on hands of thirteen volunteers divided into two groups.…”

“…[3] demonstrated that some types of gloves are not suitable for collecting ILR from hands due to significant interferences. Heavy petroleum distillates that may interfere with detection and conclusive identification of ILR were found to be present in the background of PVC and nitrile gloves.…”

“…They suggested the use of latex gloves and also developed a prototype kit for the sampling of ignitable liquids. The latex, powder-free gloves were worn by the person whose hands are examined for 20 minutes and extracted using headspace concentration extraction with an activated charcoal strip [3].…”

Detection of gasoline on suspects’ hands: Study of different sampling alternatives

“…In this perspective, sampling on the hands of suspects or other persons of interest may be worth carrying out during the first few hours after a fire event. One of the methods that has been developed and implemented at the operational level is to place the hands of a person of interest (suspect) in non-powdered latex gloves for 20 minutes [1].…”