Table 2.
Accelerated solvent extractor (ASE®) 300 (Dionex, Sunnyvale, CA, USA) parameters and solvents used to clean polystyrene divinyl benzene (XAD-2) and polyurethane foam (PUF). Quartz fiber filters (QFFs) were cleaned by baking at 350°C for 12 h. ASE® parameters and solvents used for the extraction of semivolatile organic compounds from XAD-2, PUF, and QFF are also given. Solvents included hexane (Hex) and acetone (Ace). The multiple solvents used for the extraction of the QFF, in addition to the cleaning of the XAD-2 and PUF, were sequential extractions. The ASE® parameters: Temp (extraction cell temperature), static hold time for extraction (Static), solvent flush percent of cell volume (Flush%), static cycle (Cycles), and a N2 purge time (Purge). Not applicable (NA).
| Media | Solvent | Number of Extractions |
Cycles | Temp., °C |
Static, min. |
Flush% | Purge, sec. |
|---|---|---|---|---|---|---|---|
| Cleaning | |||||||
| XAD-2 | 100% Ace | 1 | 5 | 75 | 5 | 100 | 240 |
| 25:75 Hex:Ace | 1 | 5 | 75 | 5 | 100 | 240 | |
| 50:50 Hex:Ace | 3 | 3 | 75 | 5 | 100 | 240 | |
| PUF | 100% Ace | 1 | 1 | 100 | 5 | 100 | 240 |
| 75:25 Hex:Ace | 1 | 1 | 100 | 5 | 100 | 240 | |
| 90:10 Hex:Ace | 1 | 1 | 100 | 5 | 100 | 240 | |
| QFF | NA | NA | NA | NA | NA | NA | NA |
| Extraction | |||||||
| XAD-2 | 50:50 Hex:Ace | 1 | 3 | 75 | 5 | 100 | 240 |
| PUF | 75:25 Hex:Ace | 1 | 2 | 100 | 5 | 100 | 240 |
| QFF | 50:50 Hex:Ace | 1 | 3 | 100 | 5 | 100 | 240 |
| 100% Hex | 1 | 3 | 100 | 5 | 100 | 240 | |