科研之友
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摘要
The analysis of 252 food samples (UK-produced and imported) purchased from a variety of retail outlets in the UK was undertaken for the presence of perfluorooctanesulphonic acid (PFOS), perfluorooctanoic acid (PFOA) and nine other perfluorocompounds (PFCs). A limit of quantification (LOQ) of 1 mu g/kg was achieved for all target analytes, in all samples. Standard addition was used for quantification of PFC levels. All 11 of the targeted PFCs were detected in 75 individual food items. In 70% of the samples, including all meat other than offal, none of the analytes were present above the LOD. The highest levels found were 59 mu g/kg perfluorooctanesulphonic acid (PFOS) and 63 mu g/kg total PFCs (Sigma PFCs) in an eel sample, and 40 mu g/kg PFOS (62 mu g/kg Sigma PFCs) in a whitebait sample. The highest level in an offal sample was 10 mu g/kg, in a wild roe deer liver. There were six samples with Sigma PFCs > 15 mu g/kg (fish, shellfish, crustaceans), a further seven samples with Sigma PFCs ranging 11-15 mu g/kg (including a liver), nine with Sigma PFCs ranging 6-10 mu g/kg (fish and livers), 31 with Sigma PFCs in the range 2-5 mu g/kg (including kidneys, popcorn and processed peas) and a further 22 with Sigma PFCs close to the LOD of 1 mu g/kg (including eggs and potatoes). These concentrations indicate that UK consumers are being exposed to a low level of PFC contamination from food. The estimated upper bound dietary intake of 10 ng/kg bodyweight (bw)/day of PFOS for average adult consumers is well below the 0.15 mu g (150 ng)/kg bw tolerable daily intake (TDI) set by the European Food Safety Authority. The lower bound adult dietary intake estimate of 1 ng/kg bw/day is similar to estimates undertaken and reported in countries such as Canada, Germany and Spain.
- 出版日期2010
