Filter performance of n99 and n95 facepiece respirators against viruses and ultrafine particles.
Filter performance of n99 and n95 facepiece respirators against viruses and ultrafine particles.
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DOI：
10.1093/annhyg/men019
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发表时间：
2008-07
期刊：
影响因子：
--
通讯作者：
Grinshpun SA
中科院分区：
文献类型：
--
作者：
Eninger RM;Honda T;Adhikari A;Heinonen-Tanski H;Reponen T;Grinshpun SA
三个过滤面罩呼吸机（两个型号的N99和一个N95）的性能挑战与惰性气溶胶（NaCl）和三个病毒气溶胶（肠杆菌噬菌体MS 2和T4和枯草芽孢杆菌噬菌体）-所有具有显着的超细成分-使用基于人体模型的协议与呼吸机密封在人体模型上进行了检查。测试了三种吸入流速，30、85和150 l min-1。测定了过滤器渗透率和品质因数。呼吸器之间和呼吸器内的渗透值进行比较。在最具穿透力的粒径（MPPS）下，>3%的MS 2病毒粒子以85 l min-1的吸入流速穿透了两种N99型号的过滤器。吸入气流对颗粒物通过测试呼吸器过滤器的渗透有显著影响。滤波器品质因数被发现适合于进行相对性能比较。对于所有测试的喷雾器，挑战气溶胶的MPPS的电迁移率直径<0.1 μm。与>0.1 μ m的颗粒相比，当包括<0.1 μ m的尺寸分数时，平均颗粒渗透（通过计数）显著增加。N95呼吸器的过滤性能接近两种型号N99呼吸器的过滤性能，在测试的颗粒尺寸范围内（≤ 0.02 μm至0.5 μm）。测试的生物气溶胶的过滤器渗透没有超过惰性NaCl气溶胶。结果表明，惰性氯化钠气溶胶一般可能是适当的模拟过滤器渗透类似大小的病毒粒子。
The performance of three filtering facepiece respirators (two models of N99 and one N95) challenged with an inert aerosol (NaCl) and three virus aerosols (enterobacteriophages MS2 and T4 and Bacillus subtilis phage)—all with significant ultrafine components—was examined using a manikin-based protocol with respirators sealed on manikins. Three inhalation flow rates, 30, 85, and 150 l min−1, were tested. The filter penetration and the quality factor were determined. Between-respirator and within-respirator comparisons of penetration values were performed. At the most penetrating particle size (MPPS), >3% of MS2 virions penetrated through filters of both N99 models at an inhalation flow rate of 85 l min−1. Inhalation airflow had a significant effect upon particle penetration through the tested respirator filters. The filter quality factor was found suitable for making relative performance comparisons. The MPPS for challenge aerosols was <0.1 μm in electrical mobility diameter for all tested respirators. Mean particle penetration (by count) was significantly increased when the size fraction of <0.1 μm was included as compared to particles >0.1 μm. The filtration performance of the N95 respirator approached that of the two models of N99 over the range of particle sizes tested (∼0.02 to 0.5 μm). Filter penetration of the tested biological aerosols did not exceed that of inert NaCl aerosol. The results suggest that inert NaCl aerosols may generally be appropriate for modeling filter penetration of similarly sized virions.
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DOI：
10.1080/15298668491400331
发表时间：
1984-01-01
期刊：
AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL
影响因子：
--
作者：
HARBER, P;TAMIMIE, J;BARBER, M
通讯作者：
BARBER, M
影响因子：
5
作者：
Cho, SH;Seo, SC;Reponen, T
通讯作者：
Reponen, T
影响因子：
--
作者：
Balazy, A;Toivola, M;Grinshpun, SA
通讯作者：
Grinshpun, SA
影响因子：
4.5
作者：
Boskovic, Lucija;Agranovski, Igor E.;Braddock, Roger D.
通讯作者：
Braddock, Roger D.
DOI：
10.1080/15459620801960153
发表时间：
2008-01-01
影响因子：
2
作者：
Eninger, Robert M.;Honda, Takeshi;Grinshpun, Sergey A.
通讯作者：
Grinshpun, Sergey A.