Some factors that affect the filtration of nicotine from cigarette smoke
A rapid and accurate VPC procedure for determining the amount of nicotine removed by a filter had been described. The VPC results were found to compare favorably with those obtained using a silicotungstic acid precipitation method and a spectrophotometric procedure. This VPC method was used to study several factors that affect the removal of nicotine from cigarette smoke. It was shown that the butt length to which a cigarette is smoked has an effect on the amount of TPM and nicotine removed by a filter - the shorter the butt length the higher the removal. The addition of certain additives to a cellulose acetate filter was shown to increase the removal of nicotine from the smoke. The additives that gave a selective removal of nicotine from the smoke were glycerol, 1,4-butanediol, and 3,3-oxydi-1,2-propanediol. A 3-den./fil. cellulose acetate filter containing 19% glycerol removed 36% of TPM and 52% of the nicotine·from cigarette smoke. This selectivity was observed for bright, burley, Turkish, and blended tobaccos. The moisture content of the tobacco was shown to have little or no effect on the performance of a cellulose acetate filter containing glycerol.