| abstract |
A method for controlling nicotine delivery through a cigarette filter (16) relative to total particulate pass-through concentration, and the corresponding filter utilizing, as a filter modifier component (22), at least one water-soluble metal salt of a weak acid, the choice and amount of salt within the filter favoring an alkaline pH exceeding about pH 8, the amount of alkalinity being correlated to the desired amount of nicotine pass-through while corresponding nicotine filter retention properties are keyed to the presence and concentration of a water soluble salt of a strong acid within the filter. |