HPLC-ANALYSIS OF PHENOLIC ANTIOXIDANTS IN AQUEOUS MIGRATES OF RUBBER ARTICLES COMING IN CONTACT WITH POTABLE WATER

The present paper describes a HPLC-method for determination of seven p henolic antioxidants admitted in the KTW-Recommendation ,,Natural and synthetic rubber products''. Because of their low concentration in aqu eous migrates a selective enrichment using solid phase extraction (SPE ) is indispensible resulting recoveries of 75-95%. The phenolic compou nds are separated completely from each other by gradient elution with acetonitrile/tetrahydrofurane/phosphoric acid (pH=2). They are measure d quantitatively using an external standard. The HPLC-method may be us ed for quality control of the specific migration from food contact rub ber articles in routine.