加速溶劑萃取是利用溶劑在高溫高壓下的特性，將待測物從基質中萃取出來，是近幾年備受注目的一種前處理的方法，而高效率液相層析儀分析系統則常被用來作為加熱後不易揮發或熱不穩定性物質定性定量的工具。
本研究是針對美國環保署公告列管之16種PAHs，利用MOUDI（Micro-Orifice Uniform Deposit Impactor）採樣器針對台中火力發電廠及高雄中鋼碳素公司兩排放源進行粒狀物質之採樣，採集之粒徑範圍包括0.18、0.32、0.56、1.0、1.8、3.2、5.6、10、18 μm，採集回來之樣品則利用自行組裝之加速溶劑萃取系統及甲醇搭配正己烷（體積比1：1）的萃取溶劑進行前處理，PAHs定性及定量之分析係以液相層析儀搭配紫外光/可見光及螢光偵檢器為之。

利用本研究完整的前處理及分析系統來測試NIST已經確認之標準參考物質SRM-1649a，可得72.4％-114.6％的回收率。方法偵測極限使用紫外光偵檢器時，介於13.4-96.2 μg/L及使用螢光偵檢器時，介於0.115-0.715 μg/L。

經由分析所得之數據發現，粒狀物質中PAHs含量之粒徑分布，隨著粒徑之增加有減少的趨勢，即粒徑愈小，PAHs含量愈多。而在台中火力發電廠PAHs的指標污染物為DBA，交通污染源為FL、Pyr、BghiP，而高雄中鋼碳素細焦碳廠的採樣點，受到交通排放的影響較大，本身之指標污染物BaP相較起來較不明顯。

Accelerated solvent extraction (ASE), the method, uses elevated temperature (100℃) and pressure (2000 psi) to achieve analyte recoveries equivalent to those from Soxhlet extraction, using less solvent (5 mL) and taking significantly less time (30 min), than the Soxhlet procedure. High performance liquid chromatograph (HPLC), the analytic system, often uses to be a qualitative and quantitative tool for thermal unstable compounds.
This study aims at 16 important polycyclic aromatic hydrocarbons (PAHs). We use Micro-Orifice Uniform Deposit Impactor (MOUDI) to gather particulate matter aiming at Taichung Thermal Power Plant and China Steel Chemical Corporation (CSCC). The particle size range is from 0.18 to 18 μm. The sample pretreatment used homemade ASE extracted system, and used methanol : hexane (v : v = 1 : 1) as extracted solvent. PAHs were analyzed by HPLC/UV-VIS and Fluorescence detector.

Use the whole analytic system to analyze the urban dust standard reference material (SRM-1649a), the recovery is 72.4％-114.6％. Method detection limit for UV-VIS detector is 13.4-96.2 μg/L, and for fluorescence detector is 0.115-0.715 μg/L。

According to the result, there is a tendency of particle bound PAHs to adsorb the smaller particulate matter. The index pollutant of thermal power plant is DBA, traffic is FL, Pyr, and BghiP, and the index pollutant of CSCC is BaP.

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