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HPLC study of migration of terephthalic acid and isophthalic acid from PET bottles into edible oils
Author(s) -
Mousavi Khaneghah Amin,
Limbo Sara,
Shoeibi Shahram,
Mazinani Somayeh
Publication year - 2014
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.6540
Subject(s) - terephthalic acid , isophthalic acid , sunflower oil , polyethylene terephthalate , chemistry , european union , food science , chromatography detector , fatty acid , chromatography , high performance liquid chromatography , organic chemistry , materials science , polyester , business , composite material , economic policy
BACKGROUND Polyethylene terephthalate ( PET ) containers for food oil packaging were evaluated with a newly established determination method for terephthalic acid ( TPA ) and isophthalic acid ( IPA ). The analysis of monomers, TPA and IPA that migrate from PET bottles into oils was performed using high‐pressure liquid chromatography with a diode array detector. Three types of commercial oils (sunflower oil, canola oil and blended oil which included sunflower oil, soy bean oil and cottonseed oil) were bottled in PET containers. These samples were incubated for 10 days at 49 °C as accelerated test condition.RESULTS The means of recovery for this method varied from 70% to 72% and from 101% to 111% for TPA and IPA , respectively. The results showed that the amounts of specific migration of TPA and IPA into the samples conform to European Union legislation that identifies specific migration limits. More important, the results highlighted a different behavior of migration as a function of the fatty acid profile.CONCLUSION Previous investigations have been performed with food simulants such as HB 307 or 20% ethanol but our study used real food samples and determined trace amounts of the migrated compounds. Further investigation will be needed to better explain the influence of fatty acid conformation on migration of PET monomers. © 2013 Society of Chemical Industry