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Matrix effect (ME) evaluation for the studied analytes in the spiked QuEChERS extracts after DLLME and H2SO4 clean-up (n = 5).
| Analyte | ME (%) | RSD (%) |
|---|---|---|
| Hexachloro-1,3-butadiene | −5.1 | 11 |
| Pentachlorobenzene | −1.9 | 11 |
| Tetrachloro-m-xylene (IS-1) | −1.3 | 12 |
| alpha-HCH | −1.2 | 11 |
| Hexachlorobenzene | 3.8 | 13 |
| beta-HCH | 9.3 | 10 |
| Lindane | 2.3 | 10 |
| delta-HCH | 3.6 | 11 |
| Heptachlor | 1.0 | 12 |
| BDE-28 | 1.6 | 14 |
| BDE-47 | 5.7 | 16 |
| BDE-77 (IS-2) | 1.3 | 15 |
| BDE-100 | 3.9 | 16 |
| BDE-99 | 10 | 14 |
| BDE-154 | 7.0 | 14 |
| BDE-153 | 11 | 14 |
