Development of Nitro-Pahs Analytical Method for the Mobile Particulate Matter

[[abstract]]????, ???? 9401 ~ 9412 , ????1000??[[abstract]]?????????????????????????????????????????????????PAHs?????????????????????????????????????????????????????15-700 pg/m3??????1-160 pg/m3 ?????????????PAHs?????????????????????????????: ????????????????????????????????????????????????????????????????????????[[abstract]]Abstract Nitrated-polycyclic aromatic hydrocarbons (NPAH), existence in ambient atmospheric particles, may be emitted from direct sources, such as diesel and gasoline exhaust, and may be produced from gas-phase reactions of parent polycyclic aromatic hydrocarbons (PAHs). Many NPAHs are highly persistent in the environment and can be transported long distances from their original source. The increased attention to NPAHs in the environmental analytical community is owing to their persistence in the environment and higher mutagenic and carcinogenic potency of certain compounds. The concentration of NPAHs is one to two magnitudes lower than that of un-substituted PAHs. The objective of this study is: i) to develop an improved analytical procedures to quantify selected NPAH isomers in ambient air and diesel particulate; and, ii) to evaluate the NPAHs contribution from diesel engine emission for the risk assessment to human health