Moyer E S
U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, Morgantown, WV 26505-2888.
Am Ind Hyg Assoc J. 1987 Sep;48(9):791-7. doi: 10.1080/15298668791385589.
More efficient methods of characterizing organic vapor (OV) respirator performance against the wide range of compounds and environmental conditions found in industrial settings are needed to improve respiratory protection in the workplace. One method, based on Jonas' kinetic model, has potential application for evaluating OV cartridges and more efficiently utilizing available research, testing and certification resources. Jonas has shown that the kinetic adsorption capacity and gas adsorption rate of a small packed charcoal sorbent bed is described by the linear relationship between gas breakthrough time and sorbent weight as predicted by the modified Wheeler equation. This research is based on the hypothesis that characterizing sorbent performance against a reference compound will allow prediction of breakthrough times, and therefore prediction of cartridge life, for other compounds under similar conditions. Baseline data on dried cartridges at dry conditions are presented that demonstrate that the linear relationship between breakthrough time and and sorbent weight that Jonas showed for small sorbent columns also holds when commercially manufactured respiratory cartridges are stacked in series to resemble a packed column of varying bed length and sorbent weight. This suggests the potential applicability of the Jonas model for characterizing and evaluating commercially available OV respirator cartridges.
为了改善工作场所的呼吸防护，需要更有效的方法来表征有机蒸气（OV）呼吸器在工业环境中广泛存在的各种化合物和环境条件下的性能。一种基于乔纳斯动力学模型的方法，在评估OV滤毒罐以及更有效地利用现有的研究、测试和认证资源方面具有潜在应用价值。乔纳斯表明，小型填充木炭吸附剂床的动力学吸附容量和气体吸附速率可通过修正的惠勒方程预测的气体穿透时间与吸附剂重量之间的线性关系来描述。本研究基于这样一个假设：针对参考化合物表征吸附剂性能将能够预测其他化合物在类似条件下的穿透时间，进而预测滤毒罐的使用寿命。文中给出了干燥条件下干燥滤毒罐的基线数据，这些数据表明，当将商业制造的呼吸滤毒罐串联堆叠以类似于不同床长和吸附剂重量的填充柱时，乔纳斯在小型吸附剂柱中所展示的穿透时间与吸附剂重量之间的线性关系同样成立。这表明乔纳斯模型在表征和评估市售OV呼吸器滤毒罐方面具有潜在的适用性。
