IDENTIFICATION OF TRACE QUANTITIES OF FLAMMABLE LIQUIDS WITH THE USE OF TWO-STAGE THERMAL DESORPTION
The investigation of the causes of a fire or fire at industrial facilities often leads to the fact that as the initiators of combustion was used with flammable or combustible liquids. However, delay in examination or high temperature in the combustion zone can result in the inability to detect trace amounts of residue after burning flammable liquids. With this regard, relevant is the application of modern methods of physical-chemical analysis, which allow to establish a presence in the air is fairly small quantities of such substances, spill, rough handling, or evil intention in the use of which could cause fire and damage. Such an accident can lead to subsequent fire or detonation, resulting in appropriate sanitary and material damage. Used in this paper chromatographic method of analysis with preliminary concentration of vapors of flammable liquids in the two-stage kiln. Evaluate the content of vapors of flammable liquids in air conducted a series of experiments with various amounts of spilled substances obtained chromatograms, which are further used for quantitative and qualitative identification of the burned-out vapour. In this paper, we investigated the minimum detectable quantity of flammable substances in air collected before and after combustion of the test mixture.