DETERMINATION OF GAS-PHASE SIDESTREAM CIGARETTE-SMOKE COMPONENTS USING FOURIER-TRANSFORM INFRARED SPECTROMETRY

Five gas-phase compounds in fresh sidestream cigarette smoke mere dete rmined using Fourier transform infrared (FTIR) spectrometry, Ammonia, carbon dioxide, carbon monoxide, hydrogen cyanide and nitric oxide yie lds for five different cigarette brands were measured, Gas concentrati ons in the sidestream smoke mere calculated from absorbance measuremen ts made approximately every 30 s, Component yields were calculated by integrating the concentration versus time curves over the cigarette sm oking period with incorporation of sample flow and gas cell pressure d ata, Results of these measurements were compared with measurements mad e using standard analytical techniques: infrared absorption using non- dispersive infrared (NDIR) analysers for the determination of carbon d ioxide and carbon monoxide, chemiluminescence for nitric oxide and spe ctrophotometric-based methods for ammonia and hydrogen cyanide, Statis tical analysis of the results indicates that the FTIR-based method and the standard methods are equivalent for two analytes, ammonia and car bon dioxide, but are significantly different for carbon monoxide, hydr ogen cyanide and nitric oxide, The mean yields per cigarette for carbo n monoxide, hydrogen cyanide, and nitric oxide using the FTIR-based me thod are approximately 45% higher than those for the NDIR-, spectropho tometric- and chemiluminescence-based methods used for these compounds .