Case Study #2, Chemical Characterization of the Test Article Extract
| Extractable | Quantitation Method | Concentration in Extract, mg/L | Calculated Equivalent TOC Concentration, mg/L | ||
|---|---|---|---|---|---|
| pH 5 | pH 9 | pH 5 | pH 9 | ||
| Screening Methods | |||||
| All extractables detected | HS-GC/MS | 0.00 | 0.73 | 0.00 | 0.44 |
| All extractables detected | LC/MS | 0.14 | 0.04 | 0.08 | 0.02 |
| All extractables detected | GC/MS | 3.6 | 4.9 | 1.9 | 3.0 |
| % TOC Reconciliation | 16.5% | 27.4% | |||
| Supporting Methods | |||||
| Formic acid | IEC | 6.1 | 5.3 | 1.6 | 1.4 |
| Acetic acid | IEC | 14.5 | 16.4 | 5.8 | 6.6 |
| Glycerol | IEC | 0.12 | 0.11 | 0.05 | 0.04 |
| Diethylene glycol | IEC | 0.46 | 0.57 | 0.21 | 0.26 |
| 1,2-Propane diol | IEC | 4.1 | 4.3 | 1.9 | 2.0 |
| Tetraethylene glycol | IEC | 2.0 | 2.6 | 0.99 | 1.3 |
| % TOC Reconciliation | 105% | 118% | |||