The aim of this study is to apply an automated identification and quantification system with a GC-MS database (AIQS-DB) for simultaneous analysis of phthalate esters (PAEs) and sterols in air particles. Air particles samples were collected on the roof of a buildingnear congested traffic road (Pham Van Dong street, Ha Noi) (AP1) and in a highly populatedresidential area (Phu Do town) (AP2). At each sampling location, samples were collected separately for 10 hours each at day and night, during continuously 6 days by Kimoto high-volume air sampler. | Application of an automated identification and quantification system with a GC/MS database (AIQS-DB) for simultaneous analysis of phthalate esters and sterols in air particles