Tobacco Documents Online

PROJECT NUMBER : 2501 PROJECT TITLE : Smoke Cbemistry PROJECT LEADER : D. D. McRae PERIOD COVERED : Deoaaber, 1991 L SIDESTREAM SMOKE CHAMBER A. Ob.iective: Operate an envirotmentally controlled chamber to measure selected components of sidestream smoke. B. Results: Sidestream smoke collection nuffi using X8D9XO cigarettes have been completed. These runs were performed at the request of Biochemical Research. Chamber runs for the magnesite experimental series have also been completed. All analytical measurements except for nicotine have been performed. The chamber has been shut down for maintenance during the week of December 16th and for the general Tower closing over the Holidays. C. Plans: Finish analytical measurements and report the results for the magnesite models. Complete chamber maintenance. Perform furthex chamber runs to test the new aerosol particle size measuring equipment. IL SIDESTREAM SMOKE: CHENIICAL PROPERTIES A. Ob.iective: Conduct studies on sidestream smoke including: development of methods for collection and analysis of sideslneam semivolat>Zes and gas phase; visibility determinations; analysis of selected materials relatdng to sidesaeam odor and irritation; development of proprietary products. B. Results: Headspace gc/ms analyses of the 30-cigarc,tte runs of X8D1WG (control) and X8D 1 WJ (70% sidestream reduction) were completed. Because larger amounts of material were collected in the 30-cigai+dte nms, mom gc peaks ooiild be detected and a new analysis procedure was developed. About 450 peaks were detected out of which 230 were tentatively identified. This data was transferred to J. Blankenstrip for statistical analysis. The statistical analysis identified compounds that aic present in the sidesaeam smoke of each cigarette type at significantly different levels. The gc sulfur detector has been transfernod to F. Hsu for planned expetiments in AnalyticaL C. Plans: Headspace gc/ims data for the magnesite models will be submitted for statistical analysis. Plans are being made to collect side.suram gas phase samples from the prototype CORESTA smoking machine. These samples will be compared to the samples collected from the chamber. Cg1.p6387

2501-2 IIL SIDESTREAM SMOKE: PHYSICAL PROPERTIES A. Objective: Conduct studies on sidestream smoke including: prototype CORESTA smoking runs; particle size and visibility deteiminadans; mechanistic smdies; iofrared camera and video observations. B. Results: Video taped images of the magnesite models and tbeir cood+ol have been reviewed. The magnesite models have perforated paper and sidestream smoke is clearly seen to exit through the perforatiai holes. However, the mass of sidestream smoke emerging from the perforations is probably quite small and is not normally visible to the casual observer. The smoldering magnesite models look very simi7ar to previous low sidestneam cigarette models. However, we have seen some unosual events that will require moie study to determine their significance. Chamber runs to measure the aerosol properties of the magnesite series have been made. Sevend more runs will be needed to complete the data set. These nms will also be used to provide data to compare the results from the new and old particle size measuring instruments. CO and CO monitors ue being tested in preparation for their use with the new prototype CdRESTA smoking machine. C. Plans: Prototype CORESTA smoking runs will be performed on an as needed basis. Construction of the second generation machine will be monitored. Analysis of IR images will begin once the image processor board is reinstalled. Aerosol chamber runs will be completed. IV. MISCELLANEOUS 1. Pyrolysis gc/ms analyses have been performed on a variety of compounds. 2. Samples from the isolation of compounds from carbon-14 radiolabelled tobacco were anlyzed with the Harvey oxidizer to determine specific activities. 3. Additional nicotine analyses were performed in support of work to determine the feasibility of using resins to trap nicotine from waste streams. , 2