Substrate Materials Sample Preparation
Samples are approximately 6 cm x 6 cm in size. Samples are prepared un-heated (unburned)and heated (burned). The heated samples are produced by a modified destructive distillation method based on a method developed by the State of Florida Bureau of Forensic Fire and Explosives Analysis. Samples are placed up side down in an un-lined metal quart paint can in which the lid with nine 1 cm diameter holes is placed loosely onto the can. Heat is applied to the bottom of the can by a propane torch held 4 cm from the bottom of the can. Once smoke appears from the can, heat continues to be applied for an additional 2 minutes. After the 2 minutes, the heat is removed and the lid is replaced with a solid lid to allow vapors within the headspace to condense as the can temperature returns to room temperature.