Detection of primary aromatic amines content in food packaging ink and migration from printed plastic bags

The extraction experiment of PAAs is carried out by using different solvents to seek out the best extraction one among methylene chloride, n-hexane, ethyl acetate and methanol. Migration test of PAAs from different polymer flexible packaging composite materials under both conditions of 40 ℃/10d and 70 ℃/2 h in neutral and oil simulants are conducted. An effective HPLC method in ESI+ mode is proposed to separate and screen 25 kinds of PAAs listed in SN/T 2893–2011. The extraction test clearly confirms the existence of PAAs in both polyurethane ink and UV-ink which are supposed to be yielded from dye intermediate and azo auxiliary. The comparison study of migration under 70 ℃/2 h for the corona and non-corona surfaces of the above-mentioned two kinds of films reveals that corona treatment improves the printing capacity and thus motivates the migration of PAAs, but has no effect on the final migration quantity.