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。懸浮微粒所組成的成分複雜，並且微粒上容易吸附許多的汙染物依同飄散於空氣中，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九月為止進行約一年又三個月的總懸浮微粒採樣。採樣完成後以離子層析法進行陰陽離子的分析，共計分析Na+、NH4+、K+、Mg2+、Ca2+、F-、Cl-、Br-、NO3-、PO43-、SO42-等十一種陰陽離子，並以主因素分析進行來源探討，並藉由一整年的離子濃度改變來探討空氣中陰陽離子污染物如何隨著季節和氣候而循環變化。
分析結果發現，懸浮微粒中陰陽離子的分佈以硫酸根、硝酸根及鈉離子為主要成分，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。而由整年的結果中可看出，民國九十三年離子濃度比九二年要來的高。並且由主因素分析的結果可看出新竹及桃園地區的陰陽離子來源主要以交通污染為主，而固定污染源的排放，營建工程及陸地揚塵之鹽分亦為來源之一。

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