A novel method for the analysis of bisphenols in solid foodstuffs was developed.
Sample disruption with sand improved USAE efficiency in fatty samples.
PSA sorbent allowed a selective clean-up of complex food extracts.
Derivatization with pyridine-3-sulfonyl chloride highly improved ESI ionization.
BPS, 2,2′-BPF, 2,4′-BPF and 4,4′-BPF were found in canned beef ravioli.