| compounds | Spiked level (10 μg/kg) | Spiked level (50 μg/kg) | Spiked level (100 μg/kg) | |||
| Recovery (%) | R.S.D. (%) | Recovery (%) | R.S.D. (%) | Recovery (%) | R.S.D. (%) | |
| PCB 28 | 95.2 | 4.21 | 101 | 3.78 | 93.2 | 3.26 |
| PCB 52 | 92.8 | 3.58 | 92.8 | 3.97 | 98.3 | 2.68 |
| PCB 101 | 96.5 | 5.06 | 95.2 | 4.66 | 95.1 | 4.01 |
| PCB 118 | 98.1 | 4.32 | 98.4 | 6.32 | 90.9 | 3.82 |
| PCB 153 | 94.6 | 3.77 | 97.8 | 4.21 | 102 | 3.21 |
| PCB 138 | 93.4 | 2.58 | 96.2 | 3.35 | 99.3 | 2.12 |
| PCB 180 | 98.9 | 3.05 | 96.6 | 3.12 | 98.5 | 2.44 |