Abstract: The contents of phthalate acid esters (PAEs) BBP, DBP, DEHP, DNOP, DINP and DIDP in milk were investigated by GC/MS. According to the U.S. environmental protection agency(EPA), the extraction method of room temperature oscillation was better than ultrasonic. The milk samples pre-treatment were extracted with n-Hexane using constant temperature shocker at room temperature 1.5 h. The recovery rate of each PAEs were 85.00% to 102.14%, relative standard deviation (RSD) values were 1.88% to 5.50%. The results indicated that the method was effectively to detect the PAEs in milk, and this method was convenient, accurate and relable. The high detectable rate of AEs,DEP and DnBP in marker milk, the largest detected quantity of EPA was BBP. EHP and DnOP were detected in plastic bags milk, and the amount of them were higher than other packaging’s. It was indicated that the packaging materials could contaminated milk, and need to cause enough attention.

Key words: milk; phthalic acid ester; environmental hormone