Morre D E, Smith T J
Am Ind Hyg Assoc J. 1976 Aug;37(8):453-8. doi: 10.1080/0002889768507495.
The performance of three commonly used chemical cartridge respirators for SO2 was measured under working conditions in a copper smelter. An effective SO2 protection factor for each man-respirator trial was calculated as the ratio between average SO2 concentrations sampled outside the respirator mask and that simultaneously sampled from inside the mask. The in-use SO2 protection afforded by the three respirators proved to be highly variable with mean protection factors of 22, 18, and 13. The distributions of the protection factors and the effects of mask type, facial size, and mask comfort are discussed.
在一家铜冶炼厂的工作条件下，对三种常用的用于防护二氧化硫的化学滤毒罐式呼吸器进行了性能测试。每次人-呼吸器试验的有效二氧化硫防护系数计算为呼吸器面罩外部采样的平均二氧化硫浓度与面罩内部同时采样的浓度之比。事实证明，这三种呼吸器在实际使用中的二氧化硫防护效果差异很大，平均防护系数分别为22、18和13。文中讨论了防护系数的分布以及面罩类型、面部尺寸和面罩舒适度的影响。
