本研究利用PM2.5旋風分離器，針對大氣中懸浮微粒，進行其中懸浮微粒水溶性與含碳成分之特性分析，期能利用大氣懸浮微粒其OC與EC最小的比值、CMB貢獻源比例與排放源資料庫這三種方法，推算出二次衍生性氣膠的生成比例，並加以比較之。另外，再利用逆軌跡模式模擬氣團移動路線，探討軌跡線上衍生性物種之生成速率，以瞭解氣團行進間形成衍生性物種之快慢與影響生成之因素。
衍生性有機碳成分生成量推估有三種方法，其結果如下：CMB貢獻源推估法：推估出衍生性有機碳成分平均值為1.84 μg/m3。最小比例法：推估出衍生性有機碳成分平均值為2.79 μg/m3。排放源資料庫：推估出衍生性有機碳成分平均值為0.45 μg/m3。這三種方法以CMB貢獻源比例推估法較準確 。
在生成速率的部份，衍生性SO42-之生成速率界於1.41 μg/m3*hr與7.29 μg/m3*hr之間，而其平均值為4.06 μg/m3*hr；衍生性NO3-之生成速率界於0.13 μg/m3*hr與3.10 μg/m3*hr之間，而其平均值為0.78 μg/m3*hr；衍生性有機碳之生成速率界於0.14 μg/m3*hr與8.70 μg/m3*hr之間，而其平均值為2.44 μg/m3*hr。而硫的轉化率為3.16 %~29.2 %，平均值為17.0 %；氮的轉化率為0.19 %~17.3 %，平均值為3.64 %；碳的轉化率界於0.59 %~27.3 %之間，其平均值為8.71 %。

This research discusses the carbonaceous species of ambient particle. Then, estimates the contribution of secondary organic carbon by minimum OC/EC ratio of ambient particle, CMB model and emission inventory source to discuss the OC/EC ratio of primary sources. In addition, this research explores the formative rate of secondary particles in trajectory by back trajectories model. Then, estimate the factor in an air mass forming secondary particle.
There is three methods to estimate secondary organic carbonaceous formation. The average value of secondary organic carbonaceous estimating for CMB model is 1.84 μg/m3. The average value of secondary organic carbonaceous estimating for minimum OC/EC ratio is 2.79 μg/m3. The average value of secondary organic carbonaceous estimating for emission inventory source is 0.45 μg/m3.
For formation rate, the formation rate of secondary SO42- is between 1.41 μg/m3 and 7.29 μg/m3 and the average value is 4.06 μg/m3. The formation rate of secondary NO3- is between 0.13 μg/m3 and 3.10 μg/m3 and the average value is 0.78 μg/m3. The formation rate of secondary organic caebonaceous is between 0.14 μg/m3 and 8.70 μg/m3 and the average value is 2.44 μg/m3. For converted rate, the converted rate of S is 3.16 %~29.2 % and the average value is 17.0 %. The converted rate of N is 0.19 %~17.3 % and the average value is 3.64 %. The converted rate of C is 0.59 %~27.3 % and the average value is 8.71 %.

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