ANALYSIS OF TINUVIN-1577 POLYMER ADDITIVE IN EDIBLE OILS USING ONLINECOUPLED HPLC-GC

An application of automated on-line HPLC-HRGC is described for direct analysis of edible oils for migrated polymer additives, The sample pre paration, separating the additive from the oil triglycerides, is carri ed out using normal phase HPLC, The fraction of the eluent containing the additive is automatically transferred to a HRGC where a second and final separation of the additive from minor oil components takes plac e. The method compares well with off-line separation methods, Migratio n data for Tinuvin 1577 from PET and PC polymers as well as an unspeci fied experimental polymer is given, The advantages and disadvantages o f using different edible oils as food simulants are discussed.