Organophosphate esters and their metabolites in eggs from Vietnam
Thanh-Thien Tran-Lam1,2, Phuong Thi Pham3, Yen Hai Dao3
1Department of Marine Mechanics and Environment, Institute of Mechanics and Applied Informatics, Vietnam Academy of Science and Technology (VAST), Ho Chi Minh City, Vietnam.
Abstract:
Data on the occurrence of organophosphate tri-esters (tri-OPEs) and their metabolites (di-OPEs) in hen's eggs are scarce. Therefore, 200 egg samples were gathered in 2023 in Hanoi, Vietnam and analysed by UHPLC-Q-Exactive HRMS. The majority of these compounds were detected, with tris(2-ethylhexyl) phosphate (0.10-2.7 ng/g wet weight (ww)) and trihexyl phosphate (0.08-2.3 ng/g ww) being the most prevalent tri-OPEs. Significant differences in tri-OPE profiles were observed in egg samples from battery-cage and free-range farming (p < .05). Despite egg levels ranging from 0.05 to 11.2 ng/g ww, Σdi-OPE accumulation in yolk and egg white was not significantly different in (p > .05). Among di-OPEs, dibutyl phosphate was found at the highest levels in the egg white, while bis(2-ethylhexyl) phosphate had the highest levels in yolk. There was no carcinogenic human health risk associated with OPEs in eggs (HQs <1).
