Km. Hart et al., THE CORRELATION BETWEEN IN-SITU, REAL-TIME AEROSOL PHOTOEMISSION INTENSITY AND PARTICULATE POLYCYCLIC AROMATIC HYDROCARBON CONCENTRATION INCOMBUSTION AEROSOLS, Water, air and soil pollution, 68(1-2), 1993, pp. 75-90
Aerosol photoemission (APE) has been found to be an excellent surrogat
e measure of particulate PAH concentration in combustion aerosols unde
r a variety of laboratory and field conditions. Samples of oil stove,
automobile exhaust, and urban air particulate matter were concurrently
analyzed for aerosol photoemission intensity and particulate PAH conc
entration. In-situ, real-time analysis of the particulate matter was p
erformed by UV-induced electron photoemission. Two photon energies, 4.
9 and 6.7 eV, were chosen for irradiation. The latter energy was more
sensitive and less selective. Particulate PAH concentrations were dete
rmined by collecting the particulate matter on a filter, solvent extra
cting the filter, and analyses of the extracts by gas chromatography/m
ass spectroscopy. Linear correlations (0.84 less-than-or-equal-to r2 l
ess-than-or-equal-to 1.00) were observed between aerosol photoemission
intensities and the sum of particulate PAH concentrations for laborat
ory and field studies under a wide variety of conditions. The studies
performed to date cover a dynamic range of three orders of magnitude (
1 to 1000 ng/m3). The time resolution is in the order of a few seconds
.