Table 2.
Extraction results from four types of SPE cartridges
| Compound | μg L−1 | % Recovery | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Exp. conc. | Strata-X | PestCarb | Florisil | C18 | Strata-X | PestCarb | C18 | Florisil | |
| t-BP | 0.40 | 0.06 | 0.01 | 0.00 | 0.00 | 15.00 | 2.50 | 0.00 | 0.00 |
| n-BP | 0.40 | 0.24 | 0.22 | 0.36 | 0.42 | 60.00 | 55.00 | 105.00 | 90.00 |
| HXP | 0.40 | 0.24 | 0.01 | 0.03 | 0.04 | 60.00 | 2.50 | 10.00 | 7.50 |
| t-OP | 0.40 | 0.23 | 0.02 | 0.05 | 0.05 | 57.50 | 5.00 | 12.50 | 12.50 |
| PBB-1 | 0.20 | 0.01 | 0.15 | 0.00 | 0.00 | 5.00 | 75.00 | 0.00 | 0.00 |
| HPP | 0.40 | 0.29 | 0.02 | 0.06 | 0.16 | 72.50 | 5.00 | 40.00 | 15.00 |
| OP | 0.40 | 0.27 | 0.01 | 0.05 | 0.24 | 67.50 | 2.50 | 60.00 | 12.50 |
| PBB-10 | 0.20 | 0.04 | 0.15 | 0.05 | 0.01 | 20.00 | 75.00 | 5.00 | 25.00 |
| NP | 0.40 | 0.19 | 0.01 | 0.08 | 0.25 | 47.50 | 2.50 | 62.50 | 20.00 |
| OPE | 0.40 | 0.43 | 0.34 | 0.42 | 0.42 | 107.50 | 85.00 | 105.00 | 105.00 |
| OPPE | 1.60 | 1.54 | 1.21 | 1.37 | 1.35 | 96.25 | 75.63 | 84.38 | 85.63 |
| PBB-18 | 0.20 | 0.05 | 0.16 | 0.10 | 0.09 | 25.00 | 80.00 | 45.00 | 50.00 |
| PBB-49 | 0.20 | 0.05 | 0.21 | 0.13 | 0.17 | 25.00 | 105.00 | 85.00 | 65.00 |
| di-NPE2 | 1.60 | 1.09 | 1.02 | 1.02 | 1.45 | 68.13 | 63.75 | 90.63 | 63.75 |
| di-NPE1 | 1.60 | 0.79 | 0.62 | 0.61 | 0.86 | 49.38 | 38.75 | 53.75 | 38.13 |
| mono-NPE | 1.60 | 1.14 | 0.88 | 0.97 | 1.20 | 71.25 | 55.00 | 75.00 | 60.63 |
| NPPE1 | 1.60 | 0.29 | 0.36 | 0.25 | 0.39 | 18.13 | 22.50 | 24.38 | 15.63 |
| TBBPA | 1.60 | 1.52 | 0.18 | 0.23 | 0.53 | 95.00 | 11.25 | 33.13 | 14.38 |
| NPPE2 | 1.60 | 0.21 | 0.19 | 0.25 | 0.16 | 13.13 | 11.88 | 10.00 | 15.63 |
| HBCD | 0.80 | 1.37 | 2.86 | 2.15 | 3.56 | 171.25 | 357.50 | 445.00 | 268.75 |
Cartridges conditioned with 5 mL ethyl acetate followed by 5 mL MeOH and 5 mL acidified water (pH 3 with HCl) and eluted with 3 × 2 mL ethyl acetate