Comparison of Nanoparticle Filtration Performance of NIOSH-approved and CE-Marked Particulate Filtering Facepiece Respirators
| Autor: | Benjamin C. Eimer, Samy Rengasamy, Ronald E. Shaffer |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Silver
Materials science business.product_category Dispersity Analytical chemistry Nanoparticle Mineralogy Air Pollutants Occupational Ultrafine particle Humans Respiratory Protective Devices Respirator Occupational Health Aerosols Public Health Environmental and Occupational Health Equipment Design General Medicine Penetration (firestop) Particulates United States Aerosol Europe Nanoparticles Particle size business National Institute for Occupational Safety and Health U.S Filtration |
| Zdroj: | Annals of Occupational Hygiene. 53:117-128 |
| ISSN: | 1475-3162 0003-4878 |
| DOI: | 10.1093/annhyg/men086 |
| Popis: | The National Institute for Occupational Safety and Health (NIOSH) and European Norms (ENs) employ different test protocols for evaluation of air-purifying particulate respirators commonly referred to as filtering facepiece respirators (FFR). The relative performance of the NIOSH-approved and EN-certified 'Conformite Europeen' (CE)-marked FFR is not well studied. NIOSH requires a minimum of 95 and 99.97% efficiencies for N95 and P100 FFR, respectively; meanwhile, the EN requires 94 and 99% efficiencies for FFRs, class P2 (FFP2) and class P3 (FFP3), respectively. To better understand the filtration performance of NIOSH- and CE-marked FFRs, initial penetration levels of N95, P100, FFP2 and FFP3 respirators were measured using a series of polydisperse and monodisperse aerosol test methods and compared. Initial penetration levels of polydisperse NaCl aerosols [mass median diameter (MMD) of 238 nm] were measured using a method similar to the NIOSH respirator certification test method. Monodisperse aerosol penetrations were measured using silver particles for 4-30 nm and NaCl particles for 20-400 nm ranges. Two models for each FFR type were selected and five samples from each model were tested against charge neutralized aerosol particles at 85 l min(-1) flow rate. Penetrations from the 238 nm MMD polydisperse aerosol test were |
| Databáze: | OpenAIRE |
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