TY - JOUR
T1 - Determination of benzo[a]pyrene diones in air particulate matter with liquid chromatography mass spectrometry
AU - Koeber, Robert
AU - Bayona, Josep Maria
AU - Niessner, Reinhard
PY - 1999/5/15
Y1 - 1999/5/15
N2 - The formation of the benzo[a]pyrene (B[a]P) diones (B[a]P-1,6-dione, B[a]P-3,6-dione, B[a]P-6,12-dione) as the main products of oxidative degradation of B[a]P has been observed under atmospheric conditions in air particulate matter. Samples were collected at two different sites in Munich, Germany. Total B[a]P dione concentrations were determined by APCI/LC-MS and ranged between 8 and 605 pg m-3. The formation of the direct mutagen B[a]P- epoxide was not observed. B[a]P dione concentrations did not correspond with B[a]P and total carbon concentrations, but showed a correlation with solar irradiation. B[a]P dione concentrations were higher on daytime filters compared to filters collected during the night. Lower concentrations of B[a]P diones were observed at the site with higher traffic contributions, suggesting a major role of atmospheric transport. Rapid, high-volume sampling indicates that the B[a]P dione formation is not dependent on B[a]P concentrations, but on photochemical conditions.
AB - The formation of the benzo[a]pyrene (B[a]P) diones (B[a]P-1,6-dione, B[a]P-3,6-dione, B[a]P-6,12-dione) as the main products of oxidative degradation of B[a]P has been observed under atmospheric conditions in air particulate matter. Samples were collected at two different sites in Munich, Germany. Total B[a]P dione concentrations were determined by APCI/LC-MS and ranged between 8 and 605 pg m-3. The formation of the direct mutagen B[a]P- epoxide was not observed. B[a]P dione concentrations did not correspond with B[a]P and total carbon concentrations, but showed a correlation with solar irradiation. B[a]P dione concentrations were higher on daytime filters compared to filters collected during the night. Lower concentrations of B[a]P diones were observed at the site with higher traffic contributions, suggesting a major role of atmospheric transport. Rapid, high-volume sampling indicates that the B[a]P dione formation is not dependent on B[a]P concentrations, but on photochemical conditions.
UR - http://www.scopus.com/inward/record.url?scp=0033562443&partnerID=8YFLogxK
U2 - 10.1021/es9805627
DO - 10.1021/es9805627
M3 - Article
AN - SCOPUS:0033562443
SN - 0013-936X
VL - 33
SP - 1552
EP - 1558
JO - Environmental Science and Technology
JF - Environmental Science and Technology
IS - 10
ER -