| Summary: | The yield of selected components in the mainstream and sidestream smoke for cigarettes of different tobacco types and a set of Kentucky Reference cigarettes have been measured. The BAT ‘fishtail’ chimney apparatus was used in conjunction with standard FTC Cambridge pad collection apparatus for the simultaneous collection of both sidestream (SS) and mainstream (MS) cigarette smoke, respectively. Comparison of MS FTC yields and MS yields from the BAT MS/SS smoke collection device showed that the smoke yields for the products of this study were similar for the two methods. Sidestream to mainstream smoke ratios (SS/MS) for TPM, nicotine, HO, ‘tar’, CO and COwere similar to those reported in the literature, despite the variety of collection devices employed in literature reports. The total nicotine accountabilities for the single tobacco cigarettes and the set of Reference cigarettes of this study were relatively constant (~53 %). Enantiomeric separation of the alkaloids in the different smoke streams was accomplished by chiral gas chromatography-mass selective detection. The levels and the enantiomeric ratios of nicotine and nornicotine varied in the smoke streams of the different cigarettes. The level and enantiomeric ratios of anaba-sine and anatabine in sidestream smoke were below detection limits of the method employed. The enantio-meric ratios of these secondary alkaloids could not be calculated. The fraction ofd -nicotine transferred to side-stream smoke did not change significantly when compared to that yielded in mainstream smoke even though the temperatures experienced during the side-stream smoke formation process are quite different (lower) from those occurring in the mainstream smoke formation process. Relatively low concentrations of the secondary alkaloids provided only a preliminary evaluation of their enantiomeric distribution in cigarette smoke.
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