There
is a dearth of information regarding the pollution status
of emerging organophosphate esters (OPEs) in wild fish. Here, we optimized
and validated a quick, easy, cheap, effective, rugged, and safe (QuEChERS)
pretreatment method, which was further applied for target, suspect,
and nontarget screening of OPEs in n = 48 samples
of wild fishes from Taihu Lake (eastern China). This integrated technique
allows us to fully identify 20 OPEs, and 9 out of them are emerging
OPEs detected in wild fish for the first time. Importantly, some of
the emerging OPEs, i.e., tris(2,4-di-tert-butylphenyl)
phosphate (TDtBPP), 4-tert-butylphenyl diphenyl phosphate
(BPDP), and 2-isopropylphenyl diphenyl phosphate (IPDP), exhibited
greater or at least comparable contamination levels as compared to
traditional ones. There were no statistically significant interspecies
(n = 6) differences regarding OPE concentrations.
However, we observed significant differences on OPE concentrations
among different tissues of silver carp (Hypophthalmichthys
molitrix), for which the intestine has the highest
OPE mean concentration (46.5 ng/g wet weight (ww)), followed by the
liver (20.1 ng/g ww) ≈ brain (20.0 ng/g ww) > gill (14.8
ng/g
ww) > muscle (11.4 ng/g ww). An interesting exception is IPDP,
which
presents an unexpectedly high concentration in the brain (0.510 ng/g
ww). Collectively, this study expands our understanding of OPE contamination
in wild fish and clearly shows that emerging TDtBPP, IPDP, and BPDP
could play an equally important role as traditional OPEs in contribution
of OPE pollution in wild fish samples.