Epoxidized soy bean oil migrating from the gaskets of lids into food packed in glass jars. Analysis by on-line liquid chromatography-gas chromatography.
The migration of epoxidized soy bean oil (ESBO) from the gasket in the lids of glass jars into foods, particularly those rich in edible oil, often far exceeds the legal limit (60 mg/kg). ESBO was determined through a methyl ester isomer of diepoxy linoleic acid. Transesterification occurred directly in the homogenized food. From the extracted methyl esters, the diepoxy components were isolated by normal-phase LC and transferred on-line to gas chromatography with flame ionization detection using the on-column interface in the concurrent solvent evaporation mode. The method involves verification elements to ensure the reliability of the results for every sample analyzed. The detection limit is 2-5 mg/kg, depending on the food. Uncertainty of the procedure is below 10%.
Fankhauser-Noti
Anja
A
Official Food Control Authority of the Canton of Zürich, P.O. Box, CH-8030 Zürich, Switzerland.
Fiselier
Katell
K
Biedermann-Brem
Sandra
S
Grob
Koni
K
D002853:Chromatography, Liquid / Q000379:methods; D004852:Epoxy Compounds / Q000737:chemistry*; D017022:Flow Injection Analysis; D005506:Food Contamination / Q000032:analysis*; D018857:Food Packaging; D006801:Humans; D007223:Infant; D007225:Infant Food / Q000032:analysis; D013058:Mass Spectrometry / Q000379:methods; D009862:Online Systems; D010968:Plasticizers / Q000009:adverse effects; D015203:Reproducibility of Results; D013024:Soybean Oil / Q000737:chemistry*
D004852:Epoxy Compounds; D010968:Plasticizers; D013024:Soybean Oil