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  • Title: Solid-phase extraction method for patulin in apple juice and unfiltered apple juice.
    Author: Trucksess MW, Tang Y.
    Journal: J AOAC Int; 1999; 82(5):1109-13. PubMed ID: 10513012.
    Abstract:
    Patulin, a mold metabolite, is commonly found in rotting apples. Some countries regulate patulin at levels ranging from 30 to 50 micrograms/L. Most analytical methods for patulin in apple juice include liquid-liquid partitions. A solid-phase extraction method has been developed for apple juice and unfiltered apple juice in the United States. A portion of the test sample (5 mL) was passed through a macroporous copolymer cartridge and was washed with 1 mL 1% sodium bicarbonate and then with 1 mL 1% acetic acid. Patulin was eluted with 3 mL 2% acetonitrile in anhydrous ethyl ether and was determined by reversed-phase liquid chromatography with UV detection at 276 nm. Recoveries ranged from 93 to 104% in test samples spiked at 20-100 micrograms/L.
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