Application of bag sampling technique for particle size distribution measurements.
Bag sampling techniques can be used to temporarily store the aerosol and therefore provide sufficient time to utilize sensitive but slow instrumental techniques for recording detailed particle size distributions. Laboratory based assessment of the method was conducted to examine size dependant deposition loss coefficients for aerosols held in Velostat bags conforming to a horizontal cylindrical geometry. Deposition losses of NaCl particles in the range of 10 nm to 160 nm were analysed in relation to the bag size, storage time, and sampling flow rate. Results of this study suggest that the bag sampling method is most useful for moderately short sampling periods of about 5 minutes.
Mazaheri
M
M
International Laboratory for Air Quality and Health, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia.
Johnson
G R
GR
Morawska
L
L
D000336:Aerosols / Q000737:chemistry*; D004784:Environmental Monitoring / Q000295:instrumentation* / Q000379:methods; D053758:Nanoparticles; D010316:Particle Size; D052638:Particulate Matter / Q000737:chemistry* / Q000302:isolation & purification*; D012965:Sodium Chloride / Q000737:chemistry*; D013997:Time Factors
D000336:Aerosols; D052638:Particulate Matter; D012965:Sodium Chloride