Tanaka S, Haneda M, Tanaka M, Kimura K, Seki Y
School of Allied Health Sciences, Kitasato University, Sagamihara, Japan.
Ind Health. 1996;34(2):125-31. doi: 10.2486/indhealth.34.125.
The breakthrough times of five organic solvents at various vapor concentrations were measured in steady-state and pulsating flows on commercially available respirator cartridges. The relationship between the logarithmic vapor concentration and the logarithmic breakthrough time of each organic solvent showed an inverse correlation in both of the flow patterns. The organic solvents with lower boiling points exhibited the shorter breakthrough times in both of the flow patterns. The ratios of the breakthrough times in the pulsating flow to those in the steady-state flow were lower than 0.9 when the vapor concentrations were higher than 600 ppm for ethyl acetate, methyl acetate, acetone and dichloromethane. From the present study, the breakthrough in the pulsating flow tends to occur earlier than in the steady-state flow when using a highly concentrated vapor of an organic solvent with a low boiling point.
在市售的呼吸器滤筒上，测量了五种有机溶剂在不同蒸汽浓度下在稳态流和脉动流中的穿透时间。在两种流动模式下，每种有机溶剂的对数蒸汽浓度与对数穿透时间之间的关系均呈负相关。沸点较低的有机溶剂在两种流动模式下的穿透时间均较短。当乙酸乙酯、乙酸甲酯、丙酮和二氯甲烷的蒸汽浓度高于600 ppm时，脉动流中的穿透时间与稳态流中的穿透时间之比低于0.9。根据本研究，当使用低沸点有机溶剂的高浓度蒸汽时，脉动流中的穿透往往比稳态流中更早发生。
