懸浮微粒是指大氣環境中除了水分子以外之固態或液態微粒，一般定義為粒徑100μm以下之粒狀物。依來源可分為原生性以及衍生性兩種。原生性氣膠的主要來源是物理破碎以及污染源的一次排放所產生，衍生性氣膠則是原生性氣膠經過大氣化學所產生的產物，常見的種類有硝酸鹽、硫酸鹽類等。
本研究與新竹市及桃園縣環保局合作，利用高量採樣法在新竹市三個、桃園縣七個人工測站，自九十二年七月起至九十三年二月止進行總懸浮微粒的採樣。並以離子層析法進行其中水溶性陰陽離子的分析，共計分析Na+、NH4+、K+、Mg2+、Ca2+、F-、Cl-、Br-、NO3-、PO43-、SO42-等十一種陰陽離子，並以因素分析進行來源探討。
分析結果發現，TSP中之陰陽離子的分佈以硫酸根、硝酸根、鈉離子為主要成分，平均濃度以桃園縣較高。而冬季的TSP及陰陽離子濃度較夏、秋二季為高，與文獻中之研究相比較，有類似的結果。而由因素分析的結果判斷陰陽離子的來源，推測新竹及桃園地區的TSP中陰陽離子的主要來源為交通污染以及固定污染源的排放，海洋飛沫及陸地揚塵之鹽分以及特殊污染源之排放亦為來源之一，亦與文獻之研究結果相似。

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