['Soulard', 'MEMORANDUM', 'January', '15,', '1990', 'TO:', 'V.', 'Norman', 'FROM:', 'A.', 'M.', 'Ihrig', 'SUBJECT:', '.', 'Organic', 'Gas', 'Phase', 'Analyses', 'Project', '279', 'Introduction', 'and', 'Conclusion:', 'The', 'organic', 'gas', 'phase', 'was', 'analyzed', 'using', 'a', '1/4', 'in.', 'x', '14', 'ft.', 'column', 'containing', '3%', 'SP-1500', 'over', 'Carbopack', 'B.', 'This', 'column', 'resolves', 'the', 'organic', 'gas', 'phase', 'into', 'some', '55', 'distinct', 'peaks.', 'A', 'study', 'using', 'a', 'commercially', 'prepared', 'mixture', 'of', 'methane', 'demon-', 'strated', 'that', 'gases', 'can', 'be', 'sampled', 'from', 'cylinders', 'and', 'quantita-', 'tively', 'injected', 'onto', 'the', 'column,', 'The', 'low', 'molecular', 'weight', 'hydrocarbon', 'region', 'is', 'clearly', 'definable', 'along', 'with', 'such', 'unusual', 'compounds', 'as', 'methyl', 'chloride.', 'The', 'chromatogram', 'has', 'two', 'multiplets', 'where', 'many', 'of', 'the', 'key', 'compounds', 'elude.', 'Even', 'after', 'varying', 'the', 'temperature', 'program', 'and', 'flow', 'rate,', 'such', 'key', 'compounds', 'as', 'isoprene,', 'acrolein,', 'acetone', 'and', 'methyl', 'ethyl', 'ketone', 'can', 'not', 'be', 'quantitatively', 'determined.', 'Resolving', 'these', 'two', 'multiplets', 'would', 'make', 'it', 'possible', 'to', 'quanti-', 'tate', 'over', '75', 'gas', 'phase', 'compounds.', '-A', 'quantitative', 'gas', 'phase', 'procedure', 'should', 'aid', 'in', 'understanding', 'the', 'effects', 'of', 'air', 'dilu-', 'tion,', 'pyrolysis', 'of', 'tobacco', 'components', 'such', 'as', 'lignin,', 'cellulose,', 'sugar,', 'etc.', 'and', 'the', 'subtle', 'differences', 'between', 'tobacco', 'types.', 'Recent', 'development', 'in', 'multi-dimensional', 'gas', 'chromatographic', 'techniques', 'could', 'accomplish', 'these', 'objectives.', 'Discussion:', 'The', 'Tobacco', 'Encyclopedia', '(1)', 'defines', 'the', '"Gas', 'Phase"', 'as', 'the', 'portion', 'of', 'the', 'total', 'tobacco', 'smoke', 'which', 'is', 'not', 'readily', 'condens-~', 'able', 'when', 'passed', 'through', 'a', 'filter.', 'Elmenhurst', 'and', 'Schultz', '(2)', 'reviewed', 'the', 'literature', 'and', 'reported', 'some', '225', 'compounds', 'in', 'the', 'cigarette', 'gas', 'phase.', 'This', 'excellent', 'review', 'cites', 'the', 'quantities', 'found', 'in', 'cigarettes', 'gas', 'phase', 'for', 'a', 'majority', 'of', 'these', 'compounds.', 'Many', 'of', 'these', 'gas', 'phase', 'compounds', 'are', 'physiologically', 'significant', 'and', 'affect', 'the', 'taste', 'and', 'flavor', 'of', 'cigarettes,', 'O9Z86E48']