Bc. Hauck et al., FIELD TESTING OF NEW AEROSOL SAMPLING METHOD WITH A POROUS CURVED SURFACE AS INLET, American Industrial Hygiene Association journal, 58(10), 1997, pp. 713-719
A new aerosol sampling method, utilizing a porous curved surface as th
e sampling inlet, has recently been developed. Previous laboratory eva
luations of this method have demonstrated its important features, such
ar low wind sensitivity and good filter collection uniformity. In thi
s study a prototype incorporating the new method was evaluated in the
field as a stationary and personal sampling device. The small sampler,
utilizing a 25-mm filter is called the button aerosol sampler and was
evaluated for collecting total airborne dust and fungal spores. The s
tudy was performed in nine poorly maintained inner-city houses during
environmental cleanups at different cleanliness levels. The button sam
pler was used in parallel with the standard 37-mm closed-face filter c
assette. Four collocated samplers of each type were tested at ail site
s as stationary samplers, and three samplers of each type were tested
at two sites as personal samplers. Aerosol samples were collected on f
ilters and analyzed using the gravimetric method for total dust and ep
ifluorescence microscopy for fungal spores. The average particle conce
ntration values measured with the button sampler and with the standard
sampling cassette were found to correlate well within ranges of 10(1)
-10(3) mu g/m(3) for total dust and 10(3)-10(5) spores/m(3) for airbor
ne fungi. he measurement results obtained with the new button sampler
showed lower intersample variations of the measured concentration leve
ls and higher uniformity of the particle deposits on the filters than
those obtained with the standard cassette.