Determination of subpicogram levels of airborne polycyclic aromatic hydrocarbons for personal exposure monitoring assessment

被引:4
作者
van Drooge, Barend L. [1 ]
Prats, Raimon M. [1 ]
Jaen, Clara [1 ]
Grimalt, Joan O. [1 ]
机构
[1] Spanish Natl Res Council IDAEA CSIC, Inst Environm Assessment & Water Res, Dept Environm Chem, C Jordi Girona 18-26, Barcelona 08034, Spain
关键词
Polycyclic aromatic hydrocarbons; Air pollution; High resolution mass spectrometry; GC-Orbitrap-MS; Aethalometer; Personal exposure monitoring; OCCUPATIONAL-EXPOSURE; URBAN; EMISSIONS; AEROSOLS;
D O I
10.1007/s10661-023-10953-z
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
A method based on the use of GC coupled to Q-exactive Orbitrap mass spectrometry (GC-Orbitrap-MS) has been developed for the analysis of polycyclic aromatic hydrocarbons (PAHs) at sub-picogram levels. Outdoor ambient air particulate matter (PM2.5) and standard reference materials (SRM2260a) were analyzed in full scan mode showing low instrumental uncertainties (1-22%) and high linearity over a wide concentration range (0.5 pg and 500 pg/mu L). Good reproducibility was obtained compared to the use of conventional single quadrupole GC-MS of PM samples. The quantification limit of the GC-Orbitrap-MS method for full scan analysis of PAHs in outdoor ambient air PM samples was 0.5 pg/mu L. This low limit allowed the analysis of PAHs in samples collected with low volumes (< 0.5 m(3)), such as punch samples from whole filters or filter strips from personal exposure monitoring equipment. PAHs were successfully analyzed in filter strips from real-time Aethalometer AE51 equivalent black carbon (eBC) analyzers used in urban and rural sites, and in personal exposure monitors of firefighters during prescribed burns. The correlations between PAHs and eBC in these analyses were very strong (r(2) >= 0.93). However, the equations obtained reflected the dominance of different emission sources, such as traffic in urban areas, wood burning for domestic heating, or wildfires. The method reported here affords the analyses of PAHs in high precision studies of atmospheric PM samples, e.g., high frequency sampling of low volumes, affording personal exposure monitoring assessments.
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页数:13
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