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CO-mttAw C MEMORANDUM June 28, 1976 TO: Dr. F. J. Minnemeyer FROM: Sue Ireland SUBJECT: pH of Particulate Phase of Selected Cigarettes A number of cigarettes were selected for the deter- . mination of particulate phase pH. They were chosen because of their sales or TVB analysis. The method used for the measurement of the pH was the one employed by A. M. Ihrig .and d'escribed'in his report Accession Number 85. He feels , that this method correlates quite well with smoke pH. We are awaiting a report from Dr. Chen with his recommendations in regard to instrumentation or methods which would be more suitably related to this study. .' , Our efforts to make cigarettes with small amounts of we do not have sufficient tobacco to make cigarettes in the plant. We will check smoke pH on these samples as .soon as possible. Leaf analyses were obtained from -H. Bogue's semi-annual report. -added free nicotine have been delayed because the maker .in the pilot plant is being used for other purposes and Leaf Analysis Cigarette Smoke pH ''TVB NIc. Marlboro (Lights) 6.65 0.85 1.67 Merit 85 7.02 0.74 1.68 Winston 85 (reg.) 6.35 0.40 1.73 Kool 85 6.97 0.49 2.10 Now 85 7.92 0.44 1.81 Now (Repeat) 8.05 0.44 Vantage 85 6.59 0.36 1.72 Marlboro 85 6.34 0.70 1.71 Winston Lights 6.30 0.85 1.67 True Blue (5 mg.) 6.45 0.43 1.80 True Green 6.50 Xc. Dr. F. J. Schultz MSI:gm