Particle Filtration Efficiency (PFE)

The Particle Filtration Efficiency (PFE) test evaluates the non-viable particle retention or filtration efficiency of filter media and other filtration devices at sub-micron levels. This test is performed on face masks and all filter material that allows 1 cubic foot per minute (CFM) flow to pass through it.../../

颗粒过滤效率（PFE）试验在亚微米水平评估不可行粒子保留或过滤效率的过滤介质和过滤设备。这个测试是对口罩进行所有的过滤材料，使1立方英尺每分钟（CFM）的流量它

Also referred to as Latex Particle Challenge, this test is required for ASTM F2100 and is performed according to the ASTM F2100 and follows the basic principle of ASTM F2299. Nelson Laboratories offers a high level of expertise in PFE testing and is one of the only companies to offer this test. In addition, Nelson Laboratories can perform all ASTM F2100 testing needed.../../

也被称为乳胶粒子的挑战，这个测试是为ASTM f2100要求是根据ASTM f2100执行和遵循ASTM f2299的基本原理。纳尔逊实验室提供高水平的专业知识和PFE测试是提供这种测试的唯一一家。此外，纳尔逊实验室可以执行所有测试所需的ASTM f2100。

In Particle Filtration Efficiency testing, the filtration efficiency of filter media materials against sub-micron particles cannot be determined using viable challenge particles. This procedure involves the generation of a particle aerosol using NIST traceable polystyrene microspheres with a Particle Measurement Systems (PMS) Model PG-100 particle generator. The particles are counted with a PMS Model LASAIR II-110 or 310 laser particle counter.../../

在粒子过滤效率测试中，过滤介质材料对亚微米粒子的过滤效率不能用可行的挑战粒子来确定。本程序涉及使用NIST聚苯乙烯微球粒子测量系统（PMS）粒子气溶胶的生成模型PG-100粒子发生器。颗粒计数与PMS模型lasair ii-110或310激光粒子计数器。

The latex particles used in this procedure have a narrow standard deviation and the design of the PMS particle generator produces a consistent particle challenge. Testing is conducted at a single particle size. Nelson Laboratories has the capability to perform the testing at 0.1µm, 0.3µm, 0.5µm and 1.0µm. ASTM F2100 specifies a challenge particle size of 0.1µm. The PMS particle counter is an optical laser based device and operates at a flow rate of 1 cubic foot per minute (CFM) or 28.3 liters per minute (LPM).

../../

 在这个过程中使用的乳胶粒子有一个狭窄的标准偏差和PMS粒子发生器的设计产生一致的粒子挑战。测试是按单个颗粒大小进行的。纳尔逊实验室有能力在0.1µM进行测试，0.3µm，0.5 m和1 mµµASTM f2100指定0.1µM. PMS粒子计数器是一种基于装置的光学激光挑战颗粒大小和工作在一个1立方英尺每分钟的流量（CFM）或28.3升每分钟（LPM）