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Can coating migration

17-Jul-2003

Food Science Central has published a report summarising the findings of three surveys which have looked at the extent to which epoxy-based polymers - used to lacquer the inside of food cans - migrate into canned foods available on the Japanese market.

Uematsu found BADGE (bisphenol A diglycidyl ether) at concentrations above 0.02 mg/kg in the oil phase in 11 of 16 canned fish samples. In four samples it exceeded 1 mg/kg, reaching 12.9 mg/kg in one case.

In the second survey by the group, 26 samples were analysed and unacceptably high levels of BADGE, BFDGE (bisphenol F diglycidyl ether) and NOGE (novolac glycidyl ethers) were again detected.

In a third survey of canned aqueous foods and beverages, BADGE.2HCl was found in one canned coffee sample and five samples of corn, while BFDGE.2HCl was detected in four samples of canned tomatoes and in one of canned corn.

No sample exceeded the 1 mg/kg EU limit for BADGE chlorohydrins (Scientific Committee on Food 1999; European Commission 2002). However, the sum of BFDGE.2HCl and BFDGE.HCl.H2O concentrations reached 1.5 mg/kg in a can of tomatoes. According to the report, the Beilstein test confirmed that all foods containing BADGE.2HCl or BFDGE.2HCl were from cans with at least one part coated with a PVC organosol.

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