Table 7 Average contents of the studied PBDE congeners in the analyzed oil samples (mean value of two parallel determinations for the composite oil sample) Concentration (pg g-1) Poppy seed Rapeseed Sesame seed Pumpkin seed Hempseed Linaire Borage Evening star \LOQ \LOQ 2.8 \LOQ 1.3 \LOQ 2.3 \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ 6.4 \LOQ \LOQ 2.1 1.6 \LOQ \LOQ 6.2 2.8 \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ 12.7 \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ 9.2 \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ 9.2 J Am Oil Chem Soc (2012) 89:389–400 \LOQ \LOQ 19.3 \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ 19.3 \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ 3.8 \LOQ \LOQ \LOQ \LOQ 3.7 \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ \LOQ 3.7 rather than for plant materials. Most of the studied PBDEs were generally not found in the investigated samples. Mostly lower brominated BDEs were found at very low concentrations. Those data are in concordance with data reported by other researchers [31–33]. However, Akutsu et al. reported high concentrations of decaBDE in vegeta- ble oils. This study does not conﬁrm those reports. Blanco et al. suggested that air concentrations of decaBDE could strongly affect analytical results and cause high values for procedural blanks [34]. Absolute concentration of PCBs in the samples were much higher that those found for PBDEs. Lower chlori- nated PCBs were the most abundant, in concordance with PBDE Congener 398 17 28 47 66 71 85 99 100 138 153 154 183 190 209 P14 70% 60% ]%50% [ ino40% t ibu30% r ton20% C 10% 0% 123 Fig. 4 Total ion current MS/MS chromatogram of marker PCB sesame seed oil fraction. Numbers in brackets indicate PCB congener number 28 52 101 138 153 180 77 81 105 114 118 123 126 156 157 167 169 189 Congener number Fig. 5 Average contributions (±SD) of congeners to marker and dioxin-like PCB fractions