TITLE:
Bioaccumulative Characteristics of Polybrominated Diphenyl Ethers in Channel Catfish and Fish Feeds from China
AUTHORS:
Xiaozhong Hu, Decong Hu, Bin Wu, Changjun Lin
KEYWORDS:
Polybrominated Diphenyl Ethers (PBDEs), Channel Catfish, Fish Feeds, Bioaccumulative Characteristics, GC-MS
JOURNAL NAME:
Journal of Environmental Protection,
Vol.5 No.11,
August
18,
2014
ABSTRACT: PBDEs are
widely used brominated flame retardant, which are increasingly reported in the
environment. Concentrations of thirteen PBDEs in a large
number of channel catfish and fish feeds collected from Hubei province of
China were investigated in this study. A fast isotopic dilution GC-MS
method was firstly developed to simultaneously determine thirteen PBDEs in channel
catfish and fish feeds in this study, and especially for the first
time PBDEs in fish feeds. Pressurized liquid extraction and
multi-layer silica gel column chromatography cleanup were used, some important
steps and crucial
parameters were modified and intensified compared with other literatures, and
GC and MS conditions were optimized. The limits of quantitation values of 0.25 - 5 μg·kg-1 wet
weight in channel catfish were calculated for PBDEs; so did 1 - 20 μg·kg-1 wet
weight in fish feeds. In
addition, good repeatability and accuracy of the whole method were achieved. The established methods were
therefore suitable for the simultaneous determinations of thirteen PBDEs in
these samples at trace contamination levels. Using the established methods,
PBDEs emerged in 10 of 180 channel catfish and 13 of 115 fish feeds, and the
dominant PBDEs homologues were PBDE-28, PBDE-47, PBDE-100, PBDE-99, PBDE-154,
PBDE-153 and PBDE-183. The detection rates of seven PBDEs congeners were in
turn respectively 1.74%, 7.83%, 4.35%, 5.22%, 3.48%, 2.61% and 2.61% in fish
feeds, and detection rates of seven PBDEs congeners were in turn respectively
1.11%, 3.89%, 2.22%, 1.67%, 1.11%, 1.11% and 1.11% in channel catfish. There
was significant correlation in PBDEs between matching channel catfish and fish
feeds (R2 = 0.742, P