Case Study #1, Chemical Characterization of the Test Article Extract
| Extractable | Quantitation Method | Concentration in Extract, mg/L | Calculated Equivalent TOC Concentration, mg/L | ||
|---|---|---|---|---|---|
| pH 3 | pH 9 | pH 3 | pH 9 | ||
| Screening Methods | |||||
| Isopropyl alcohol | HS-GC/MS | 36 | 21 | 21.5 | 12.6 |
| Tetrahydrofuran | HS-GC/MS | 0.2 | 0.2 | 0.13 | 0.13 |
| Terephthalic acid | LC/MS | 0.4 | 1.4 | 0.23 | 0.78 |
| 2-Ethyl-1-hexanoic acid | GC/MS | 0.02 | 0.02 | 0.01 | 0.01 |
| 2-Ethyl-1-hexanol | GC/MS | 0.40 | 0.20 | 0.33 | 0.19 |
| Phenol | GC/MS | 0.32 | 0.25 | 0.25 | 0.19 |
| 2-Phenyl-2-propanol | GC/MS | 0.12 | 0.08 | 0.10 | 0.06 |
| % TOC Reconciliation | 63.4% | 73.1% | |||
| Supporting Methods | |||||
| Formic acid | IEC | 0.9 | 1.5 | 0.24 | 0.40 |
| Nylon 6.6 tetramer | LC/CAD | 6.0 | 5.0 | 3.82 | 3.18 |
| Nylon 6.6 hexamer | LC/CAD | 4.0 | 3.0 | 2.60 | 1.90 |
| % TOC Reconciliation | 81.9% | 102% | |||