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MEMORANDUM January 25, 1985 TO: M.S. Ireland FROM: J.M. Johnson SUBJECT: Addition of Inorganic Acetates to Cellulose Filters Increases Nicotine/Tar Levels In a previous study, addition of potassium acetate to cellulose filters caused significant increases in nicotine and nicotine/CPM levels (1). In a continuation of this work, magnesium and sodium acetate have been evaluated as filter additives. Potassium acetate was retested. Experimental Solutions at 0%, 1% and 5% w/v of each compound in ethanol or ethanol:water were prepared. Baumgartner pure cellulose filter rods were.cut into 54 mm sections and soaked in a solution for 5 minutes. They were then air dried for 4 hours and oven dried at 30°C for 3 days. The treated rods were cut to 25 mm lengths, attached to Kent Golden Lights 100 tobacco rods, taped to elimi- nate ventilation and submitted to the smoking lab for analysis. Results are shown in Tables 1, 2 and 3. Conclusion Addition of inorganic acetates caused significant increases in nicotine delivery (21% to 44%) and nicotine/CPM levels (18% to 41%) relative to the control. Only minor differences were noted in puff count, P.D. and CO levels. For each compound, the more inorganic acetate on the filter, the higher the nicotine and nicotine/CPM levels. These results are consistent with those in the previous study (1). As a function of % w/w inorganic acetate/filter, the order of efficiency for nicotine delivery and nicotine/CPM levels, from highest to lowest, was magnesium acetate, sodium acetate and potassium'acetate. Reference 1. J.M. Johnson, "Evaluation of Potassium Acetate as a Cellulose rx Filter Additive", Lorillard Memorandum, July 25, 1984. 1-A /jw:1 ~ N N J M Johnson -1 . . C~ Xc: J. W. Childers '-D. D. Fine M. J. Minnemeyer . A. Sudholt

Table 1: Smoking Lab Results Solution NIC Used w/v (mg/cig) CPM (mg/cig) DPM (mg/cig) CO (mg/cig) Puff (/cig) P.D. (mm/cig) NIC/CPM 0% (Control) 0.71 9.9 10.7 17.3 7.8 151.1 0.0717 1% Mg Acetate 0.92 10.9 11.8 17.1 7.8 142.1 0.0844 5% Mg Acetate 1.00 11.0 12.0 17.4 7.8 143.7 0.0909 1% Na Acetate 0.87 9.7 10.6 15.9 8.1 137.8 0.0897 5% Na Acetate 0.96 10.2 11.1 16.9 7.9 139.3 0.0941 1% K Acetate 0.86 9.8 10.7 16.8 7.9 141.9 0.0878 5% K Acetate 1.02 10.1 11.1 17.3 7.6 148.8 0.1010 Results from 1st Test (1) 1% K Acetate 0.96 10.4 11.4 17.7 7.4 138 0.0923 5% K Acetate 1.09 10.4 11.5 17.3 7.3 151 0.1048 ZZtzzttR

Table 2: % Changes in Nicotine, CPM and Nicotine/CPM Levels Relative to C the Control Solution % Change Used w/v NIC CPM NIC/CPM 1% Mg Acetate +30% +10% +18% 5% Mg Acetate +41% +11% +27% 1% Na Acetate +23% - 2% +25% 5% Na Acetate +35% + 3% +31% 1% K Acetate +21% - 1% +22% 5% K Acetate +44% + 2% +41% Results from 1st Test (1) 1% K Acetate +28% + 7% +19% 5% K Acetate +45% + 7% +36%

C Table 3: % w/w Inorganic Acetate/Filter Solution Used Inorganic Acetate/Filter $ w/v $ w/w 0% (Control) 0% 1% Magnesium acetate 0.2% 5% Magnesium acetate 6.5% 1% Sodium acetate 0.7% 5% Sodium acetate 8.5% 1% Potassium acetate 2.4% 5% Potassium acetate 18.8%