1. Individual samples of foods collected for the 2003 total diet survey (all except
beverages) were pooled to obtain 19 composite food group samples. The
concentrations of selected individual polybrominated dibenzo-p-dioxins
(PBDDs), polybrominated dibenzofurans (PBDFs), polybrominated diphenyl
ethers (PBDEs) and polybrominated biphenyls (PBBs) congeners are reported
for each sample. Additionally, hexabromocyclododecane (HBCD) isomers
and tetrabromo bisphenol A (TBBPA) are also reported.
2. The reporting limits applied for PBDD/Fs, PBBs and PBDEs are similar to
those normally used for reporting chlorinated dioxins and PCBs. Typical
limits range from 0.02 ng/kg for tri- and tetra-BDD to 0.1 ng/kg for hexa-BDD
congeners on a fat weight basis, 0.01 μg/kg for PBDEs and PBBs and 0.2
μg/kg for the deca-BDE/BB compounds. These measurements were carried
out by HRGC-HRMS. HBCD and TBBPA were determined by LC-MS and
reporting limits for these range from 0.23 μg/kg for β-HBCD on a whole
weight basis to 0.49 μg/kg for α-HBCD.
3. Results presented in this report are generally expressed on a fat weight basis,
for consistency with other data sets. HBCD and TBBPA are reported on both,
fat weight as well as whole weight basis. The fat contents of all samples have
been given in the report and where applicable, WHO-TEQ values have been
calculated on both, a fat weight as well as a whole weight basis, to aid
interpretation of the data.
4. Measurement uncertainty estimates calculated as per the Eurachem guide have
been reported where possible for all the analytes measured by GC-MS.