| 摘要 |
A tobacco-smoke filter includes a granular compound or substance comprising silver permanganate and zinc oxide and acting as a catalyst for the oxidation in combination with chloramine-T for preventing poisoning of the catalyst by tobacco-smoke. For instance, the catalyst compound or substance may be interposed between a mouth-end filter section of cellulose-acetate and a filter section of paper soaked in a solution of the chloramine-T. |
