Preparation of Spike Solvents Post Extractiona
| Purified Water pH 2.5 | Purified Water pH 7 | Purified Water pH 9 | ||||
|---|---|---|---|---|---|---|
| Sample size | 3.5 g/20 cm2 | 3.5 g/20 cm2 | 3.5 g/20 cm2 | |||
| Solvent volume | 20 mL | 20 mL | 20 mL | |||
| Extract aliquot | 9.5 mL | 9.5 mL | 9.5 mL | 9.5 mL | 9.5 mL | 9.5 mL |
| Spike | 0.5 mL Water | 0.5 mL Spike Stock | 0.5 mL Water | 0.5 mL Spike Stock | 0.5 mL Water | 0.5 mL Spike Stock |
| Final volume | 10 mL | 10 mL | 10 mL | 10 mL | 10 mL | 10 mL |
↵a Solvents were prepared as outlined in the table below to capture any effects on recovery that could arise from the various solvent pH levels.