[' ', 'SUMMARY', 'A', 'modified', 'gas', 'chromatograph', 'and', 'other', 'techniques', 'are', 'used', 'to', 'quantify', 'breakthrough', 'characteristics', 'and', 'equilibrium', 'sdaoxptien', 'capacities', 'for', 'cigarette', 'filter', 'charcoals.', 'The', 'effects', 'of', 'normal', 'variables', 'such', 'as', 'activity', 'level,', 'pore', 'structure', 'and', 'particle', 'size', 'are', 'demonstrated,', 'These', 'effects', 'are', 'contrasted', 'with', 'those', 'produced', 'by', 'impregnating', 'charcoals', 'with', 'especially', 'chosen', 'reagents.', 'The', 'gases', 'tested', 'in', 'two-', 'component', 'systems,', 'using', 'nitrogen', 'as', 'the', 'carrier', 'gas,', 'are', 'acetaide-', 'hyde,', 'acrolein,', 'hydrogen', 'sulfide,', 'isoprene,', 'and', 'oxides', 'of', 'nitrogen,', 'Advantages', 'and', 'limitations', 'of', 'various', 'methods', 'for', 'increasing', 'selec-', 'tivity', 'are', 'discussed.', 'Ev.se2r90e']