The survey on the content of perfluorinated chemicals (PFCs) in blood of some fish species collected in Hanoi area

Abstract

Perflourinated chemicals (PFCs) which possess such the properties as waterproof and flame resistant are widely used to produce consumer products that are resistant to stains and grease and have the ability of fire-fighting. PFCs are persistent organic pollutants (POPs), among them, perfluorooctanesulfonic acid (PFOS) and its salts have been listed in Stockholm Convention on Persistent Organic Pollutants since 2009. PFCs in 24 blood samples of four fish species including carp, major carp, hypophthalmichthys, and tilapia collected from West lake and Yen So lake were ion-pair extracted with tetrabutylammonium hydrogen sulfate (TBA)/methyl tert-butyl ether (MTBE) and determined by liquid chromatography - tandem mass spectrometry (LC-MS/MS). PFCs were detected in all the collected fish blood samples. The recoveries of seventeen PFCs were in the range of 70-121%, and limit of detection (LOD) and limit of quantification (LOQ) in the samples were 0.03 ng/ml and 0.1 ng/ml, respectively. The average concentration of PFCs in the fish blood samples was 15.12 ng/ml (in the range of 4.58-28.61 ng/ml). The results of this study showed that the high concentrations of PFCs in the fish blood samples reflected the dissolving properties of PFCs in water. The concentration of PFCs in blood of fish species collected from Yen So lake were higher than those in West lake, and the bioaccumulation ability from the environment into blood was remarkable.