TY - JOUR
T1 - Accelerator Mass Spectrometric Determination of Carbon-14 in the Low-Polarity Organic Fraction of Atmospheric Particles
AU - Sheffield, Ann E.
AU - Currie, Lloyd A.
AU - Klouda, George A.
AU - Donahue, Douglas J.
AU - Linick, Timothy W.
AU - Timothy Jull, A. J.
PY - 1990/10/1
Y1 - 1990/10/1
N2 - Polycyclic aromatic hydrocarbons and other low-polarity organic compounds (LPCs) were Isolated from fine atmospheric particles collected In Albuquerque, NM, during December 1985. A procedure for removing solvent and oxidizing the LPC samples to C02 was developed. Recovery for the most volatile compound studied (phenanthrene) was90%, and the procedural blank was 0.98 ± 0.06 µg of C (standard error, SE, for n = 5 replicates). Sixteen samples, each containing the LPC fraction from a different aerosol sample, were prepared by this method and converted to targets for accelerator mass spectrometry. The 14C/13C ratio was measured for each target. Samples contained 38-470 µg of C. High beam currents (0.4-3.7 µA) and good Poisson statistics (>900 counts) were obtained. The 14C data were used to calculate the contribution of residential wood combustion (RWC) to LPC levels in the Albuquerque atmosphere. At a residential site, RWC contributed 81 ± 1 % (SE, n = 6) to the nighttime LPCs and 60 ± 8% (SE, n = 3) to daytime LPCs. At a roadway intersection, the RWC contribution was 74 ± 3% (SE, n = 5) at night and 47 ± 7% (SE, n = 2) during the day.
AB - Polycyclic aromatic hydrocarbons and other low-polarity organic compounds (LPCs) were Isolated from fine atmospheric particles collected In Albuquerque, NM, during December 1985. A procedure for removing solvent and oxidizing the LPC samples to C02 was developed. Recovery for the most volatile compound studied (phenanthrene) was90%, and the procedural blank was 0.98 ± 0.06 µg of C (standard error, SE, for n = 5 replicates). Sixteen samples, each containing the LPC fraction from a different aerosol sample, were prepared by this method and converted to targets for accelerator mass spectrometry. The 14C/13C ratio was measured for each target. Samples contained 38-470 µg of C. High beam currents (0.4-3.7 µA) and good Poisson statistics (>900 counts) were obtained. The 14C data were used to calculate the contribution of residential wood combustion (RWC) to LPC levels in the Albuquerque atmosphere. At a residential site, RWC contributed 81 ± 1 % (SE, n = 6) to the nighttime LPCs and 60 ± 8% (SE, n = 3) to daytime LPCs. At a roadway intersection, the RWC contribution was 74 ± 3% (SE, n = 5) at night and 47 ± 7% (SE, n = 2) during the day.
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U2 - 10.1021/ac00218a010
DO - 10.1021/ac00218a010
M3 - Article
AN - SCOPUS:0042767156
VL - 62
SP - 2098
EP - 2102
JO - Analytical Chemistry
JF - Analytical Chemistry
SN - 0003-2700
IS - 19
ER -