PMID- 26834310
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20240324
IS  - 0278-6826 (Print)
IS  - 0278-6826 (Linking)
VI  - 50
IP  - 1
DP  - 2016 Jan
TI  - Air sampling filtration media: Collection efficiency for respirable 
      size-selective sampling.
PG  - 76-87
AB  - The collection efficiencies of commonly used membrane air sampling filters in the 
      ultrafine particle size range were investigated. Mixed cellulose ester (MCE; 
      0.45, 0.8, 1.2, and 5 mum pore sizes), polycarbonate (0.4, 0.8, 2, and 5 mum pore 
      sizes), polytetrafluoroethylene (PTFE; 0.45, 1, 2, and 5 mum pore sizes), 
      polyvinyl chloride (PVC; 0.8 and 5 mum pore sizes), and silver membrane (0.45, 
      0.8, 1.2, and 5 mum pore sizes) filters were exposed to polydisperse sodium 
      chloride (NaCl) particles in the size range of 10-400 nm. Test aerosols were 
      nebulized and introduced into a calm air chamber through a diffusion dryer and 
      aerosol neutralizer. The testing filters (37 mm diameter) were mounted in a 
      conductive polypropylene filter-holder (cassette) within a metal testing tube. 
      The experiments were conducted at flow rates between 1.7 and 11.2 l min(-1). The 
      particle size distributions of NaCl challenge aerosol were measured upstream and 
      downstream of the test filters by a scanning mobility particle sizer (SMPS). 
      Three different filters of each type with at least three repetitions for each 
      pore size were tested. In general, the collection efficiency varied with airflow, 
      pore size, and sampling duration. In addition, both collection efficiency and 
      pressure drop increased with decreased pore size and increased sampling flow 
      rate, but they differed among filter types and manufacturer. The present study 
      confirmed that the MCE, PTFE, and PVC filters have a relatively high collection 
      efficiency for challenge particles much smaller than their nominal pore size and 
      are considerably more efficient than polycarbonate and silver membrane filters, 
      especially at larger nominal pore sizes.
FAU - Soo, Jhy-Charm
AU  - Soo JC
AD  - Health Effects Laboratory Division, Exposure Assessment Branch, National 
      Institute for Occupational Safety and Health, Morgantown, West Virginia, USA.
FAU - Monaghan, Keenan
AU  - Monaghan K
AD  - Health Effects Laboratory Division, Exposure Assessment Branch, National 
      Institute for Occupational Safety and Health, Morgantown, West Virginia, USA.
FAU - Lee, Taekhee
AU  - Lee T
AD  - Health Effects Laboratory Division, Exposure Assessment Branch, National 
      Institute for Occupational Safety and Health, Morgantown, West Virginia, USA.
FAU - Kashon, Mike
AU  - Kashon M
AD  - Health Effects Laboratory Division, Biostatistics and Epidemiology Branch, 
      National Institute for Occupational Safety and Health, Morgantown, West Virginia, 
      USA.
FAU - Harper, Martin
AU  - Harper M
AD  - Health Effects Laboratory Division, Exposure Assessment Branch, National 
      Institute for Occupational Safety and Health, Morgantown, West Virginia, USA.
LA  - eng
GR  - CC999999/Intramural CDC HHS/United States
PT  - Journal Article
DEP - 20151214
PL  - United States
TA  - Aerosol Sci Technol
JT  - Aerosol science and technology : the journal of the American Association for 
      Aerosol Research
JID - 9886760
PMC - PMC4729392
MID - NIHMS747480
EDAT- 2016/02/03 06:00
MHDA- 2016/02/03 06:01
PMCR- 2016/01/27
CRDT- 2016/02/03 06:00
PHST- 2016/02/03 06:00 [entrez]
PHST- 2016/02/03 06:00 [pubmed]
PHST- 2016/02/03 06:01 [medline]
PHST- 2016/01/27 00:00 [pmc-release]
AID - 10.1080/02786826.2015.1128525 [doi]
PST - ppublish
SO  - Aerosol Sci Technol. 2016 Jan;50(1):76-87. doi: 10.1080/02786826.2015.1128525. 
      Epub 2015 Dec 14.