Table 1. The limit of detection (LOD), limit of quantification (LOQ), detection frequency (DF) and geometric mean (GM), geometric standard deviation (GSD) and median concentrations (pg/mL) of analyzed PCBs in eight brands of bovine milk samples analyzed in triplicate.
| IUPAC Number | LOD | LOQ | DF | Fat Free Milk (n = 24) | Whole Milk (n = 23) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| (pg/mL) | (pg/mL) | (%) | GM(pg/mL) | GSD | Median(pg/mL) | DF (%) | GM(pg/mL) | GSD | Median(pg/mL) | |
| PCB-11 | 1.2 | 4.1 | 91.7 | 8.8 | 5.1 | 13.3 | 100.0 | 21.0 | 4.2 | 22.5 |
| PCB-77 | 1.1 | 3.6 | 62.5 | 1.2 | 2.1 | 1.3 | 65.2 | 1.1 | 2.0 | 1.3 |
| PCB-84 | 0.8 | 2.7 | 87.5 | 4.8 | 3.7 | 4.9 | 91.3 | 4.6 | 2.8 | 5.9 |
| PCB-91 | 1.1 | 3.5 | 70.8 | 1.8 | 2.7 | 1.9 | 91.3 | 2.5 | 2.2 | 2.6 |
| PCB-95 | 0.4 | 1.5 | 100.0 | 6.1 | 2.9 | 5.1 | 100.0 | 5.0 | 2.2 | 4.8 |
| PCB-101 | 1.5 | 5.0 | 100.0 | 28.9 | 2.7 | 18.3 | 100.0 | 23.6 | 2.0 | 23.4 |
| PCB-118 | 2.3 | 7.6 | 100.0 | 22.4 | 3.0 | 16.0 | 100.0 | 25.2 | 1.8 | 27.3 |
| PCB-131 | 0.3 | 1.2 | 70.8 | 0.5 | 2.8 | 0.5 | 82.6 | 0.6 | 2.7 | 0.7 |
| PCB-132 | 0.6 | 1.9 | 91.7 | 2.7 | 3.3 | 2.6 | 87.0 | 2.4 | 2.9 | 3.4 |
| PCB-135 | 5.8 | 19.4 | 75.0 | 9.2 | 2.5 | 9.2 | 69.6 | 7.9 | 2.2 | 8.1 |
| PCB-136 | 1.7 | 5.8 | 79.2 | 3.4 | 2.4 | 3.9 | 87.0 | 3.6 | 1.9 | 3.9 |
| PCB-138 | 1.5 | 4.9 | 100.0 | 25.7 | 2.4 | 21.3 | 100.0 | 25.3 | 1.6 | 25.9 |
| PCB-149 | 2.0 | 6.7 | 91.7 | 7.5 | 2.6 | 8.2 | 100.0 | 9.1 | 1.6 | 8.2 |
| PCB-153 | 0.7 | 2.2 | 95.8 | 3.5 | 2.6 | 3.4 | 91.3 | 2.7 | 2.5 | 3.8 |
| PCB-174 | 2.6 | 8.8 | 79.2 | 4.1 | 2.1 | 4.2 | 82.6 | 3.0 | 1.9 | 4.1 |
| PCB-175 | 1.7 | 5.6 | 91.7 | 2.5 | 2.7 | 2.8 | 91.3 | 2.4 | 2.4 | 2.8 |
| PCB-176 | 0.9 | 3.1 | 54.2 | 0.8 | 2.3 | 0.5 | 56.5 | 1.0 | 2.2 | 1.2 |
| PCB-180 | 1.6 | 5.3 | 91.7 | 3.6 | 1.8 | 4.0 | 78.3 | 4.1 | 2.7 | 5.7 |
| PCB-196 | 0.4 | 1.4 | 87.5 | 1.1 | 2.4 | 1.1 | 100.0 | 2.3 | 1.5 | 2.1 |
| ∑PCBs | NA | NA | NA | 179.9 | 2.0 | 156.2 | NA | 189.9 | 1.5 | 172.4 |
NA: Not applicable