Yoon Y H, Nelson J H
Am Ind Hyg Assoc J. 1984 Aug;45(8):517-24. doi: 10.1080/15298668491400205.
A previously introduced theoretical model addressing respirator cartridge contaminant breakthrough was further developed in this study. This development involved the introduction of a new theoretical parameter, a, to complement the parameters k' and tau employed in the initial theoretical approach. The extension of the theory permits the theoretical investigation of the following: (1) the effect of contaminant concentration on breakthrough time; (2) the effect of flow rate on breakthrough time; (3) the influence of contaminant concentration on percentage of breakthrough; and (4) the effect of contaminant concentration on the weight of adsorbed contaminant at a given time. We also compared new theoretical expressions with previously published empirical equations. Utilizing the parameter a, we derived a set of equations of significant practical value. These equations relate the ratio of two contaminant concentrations (one experimental reference concentration and any other concentration of interest) to either the ratio of the corresponding breakthrough times or the corresponding weights of adsorbed contaminant. Three practical examples are provided demonstrating that the new theoretical model reduces experimental work required to predict respirator cartridge service life.
本研究进一步完善了先前提出的关于呼吸防护滤毒罐污染物穿透的理论模型。这一完善包括引入一个新的理论参数a，以补充初始理论方法中使用的参数k'和τ。该理论的扩展使得能够对以下方面进行理论研究：（1）污染物浓度对穿透时间的影响；（2）流速对穿透时间的影响；（3）污染物浓度对穿透百分比的影响；以及（4）污染物浓度对给定时间吸附污染物重量的影响。我们还将新的理论表达式与先前发表的经验方程进行了比较。利用参数a，我们推导了一组具有重要实用价值的方程。这些方程将两种污染物浓度的比值（一种实验参考浓度和任何其他感兴趣的浓度）与相应的穿透时间比值或吸附污染物的相应重量联系起来。提供了三个实际例子，表明新的理论模型减少了预测呼吸防护滤毒罐使用寿命所需的实验工作。
