Science of The Total Environment, Volumes 466–467, 1 January 2014, Pages 136–151

Polychlorinated biphenyls (PCBs), polychlorinated diphenyl ethers (PBDEs) and organochlorine pesticides in selected cereals available on the Polish retail market

Marek Roszko^, , Renata J?drzejczak, Krystyna Szymczyk

http://dx.doi.org/10.1016/j.scitotenv.2013.07.016

Highlights

•191 samples of various cereals have been analyzed in total.

•The variability of the PCB/PBDE and organochlorine pesticides congener was assessed.

•The levels of POPs in cereals available on the Polish market are generally low.

•Clustering of the samples indicates coexistence of various sources of contamination.

•Elevated levels of individual pollutants were observed in several instances.

Abstract

Polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs), and organochlorine pesticides (DDT, HCH, HCB, chlordane, endrin, dieldrin, aldrin, nitrophene, metoxychlor) are man-made chemicals manufactured for numerous applications. The aim of this study was to assess levels of PCBs, PBDEs, and organochlorine pesticides in selected types of cereals available on the Polish retail market. 191 samples of various cereals have been analyzed in total. Average EC6 concentrations ranged from 56.4 (snacks) to 442.2 pg g^{− 1} (bran) while the concentration of 12 dioxin-like PCBs was in 15 (groats)–37.6 pg g^{− 1} (snacks) range. Mean dioxin equivalency concentration calculated as lower bound results in 2005 TEF values amounted to 0.120 ± 0.445 pg TEQ g^{− 1}, while 0.091 ± 0.338 pg TEQ g^{− 1} if 1998 TEF values were used. Average concentration of all 14 studied BDEs (∑14 BDE) was 112 ± 80 pg g^{− 1}, while average concentration of 13 BDEs excluding BDE #209 was only 15 ± 6 pg g^{− 1}. Pesticide concentrations observed in the analyzed samples were generally low in comparison to maximum residue levels (MRLs) actually permitted by the European Union. However, MRLs were exceeded in 7 out of all 191 analyzed samples. Total concentration of DDT isomers in one of the tested bran samples was as high as 0.053 mg kg^{− 1}. DMDT concentrations slightly above MRL = 0.01 mg kg^{− 1}were observed in 6 other samples (2 × bran, 1 × children porridge, 2 × snacks and 1 × bread). This study has shown that levels of PCBs, PBDEs and organochlorine pesticides in cereal products available on the Polish market are generally low. However, elevated levels of individual pollutants were observed in several instances.

Keywords

PCB; PBDE; Pesticides; Cereals; Ion trap mass spectrometry

Source: http://www.sciencedirect.com/science/article/pii/S0048969713007845