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KMID : 1156220090350040322
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Journal of Environmental Health Sciences
2009 Volume.35 No. 4 p.322 ~ p.333
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Evaluation of a Method for the Measurement of PAHs in the Ambient Atmosphere ? Focusing on High Volume Sampling and GC/MS Analysis
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Seo Young-Kyo
Park Dae-Kwon
Baek Sung-Ok
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Abstract
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In this study, a measurement method was evaluated for the determination of polycyclic aromatic hydrocarbons (PAHs) in the ambient atmosphere. PAHs were sampled by high-volume samplers, and were then analysed with a GC/MS system. Particulate PAHs were collected on 8’’×10’’ quartz fiber filter, while vapor phase PAHs were adsorbed on polyurethane foam (PUF). Target compounds included a total of 36 PAHs, which are known to be frequently detected in the urban atmosphere. It was not necessary to clean-up samples before samples were analyzed using GC/MS, and the overall performance of the method was tested by a variety of quality control and quality assurance schemes. It is generallyknown that the clean-up procedure can negatively affect the recovery of samples. Precision and accuracy was evaluated using SRM provided by US NIST, and the results were generally satisfactory and reliable. However, the GC/MS method appeared not to be adequate for 6-rings PAHs, such as coronene, due to its lower sensitivity. In addition,collection efficiencies for low molecular compounds, such as 2-rings PAHs, were poor because of the lower retention volume of the PUF adsorbent. As a result, it was concluded that the method based on high-volume sampling and GC/MS analysis can give very reliable data by simultaneous sampling of both particulate and vapor phases for 3-rings to 5-rings PAHs of environmental concern.
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KEYWORD
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PAHs, QC/QA, GC/MS, PUF, SRM
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