Toxic Gas Analysis from Compartment Fires using Heated Raw Gas Sampling with Heated FTIR 50 Species Gas Analysis

The need for raw fire product gas analysis for true toxic gas measurements in the room of origin in the fire is explained. All current methods of fire toxic gas analysis involve some dilution of the fire products prior to analysis and this is likely to promote oxidation of the toxics and re-equilibration of CO. The hot gas handling requirements for raw fire product gas analysis are outlined. Heated Fourier Transform Infrared (FTIR) analysers are available capable of analysing raw hot samples gases, these were developed for automotive direct exhaust gas analysis but are shown to be ideally suited to fire toxicity analysis in raw fire gases.