Minimum Ion Abundance Requirements for Semivolatile Organic Analysis(a)
Effective Date: 11/01
Point of Contact: Quality Engineer for Regulatory Programs
| Mass | Ion Abundance Criteria(b) |
|---|---|
| 51 | 30% to 80% of mass 198 |
| 68 | <2% of mass 69 |
| 69 | Present |
| 70 | <2% of mass 69 |
| 127 | 25% to 75% of mass 198 |
| 197 | <1% of mass 198 |
| 198 | Base peak, 100% relative abundance(c) |
| 199 | 5% to 9% of mass 198 |
| 275 | 10% to 30% of mass 198 |
| 365 | 0.75% of mass 198 |
| 441 | Present but less than mass 443 |
| 442 | 40% to 110% of mass 198 |
| 443 | 15% to 24% of mass 442 |
(a) Minimum criteria for ion abundance of the key ions should be met or exceeded.
(b) DFTPP is used to tune the GC/MS for semivolatile analysis based on Contract Laboratory Protocol OML01.8 (EPA 1991) and sub-ject to update. Laboratory procedures shall include any unique tuning requirements for analyses not covered here.
(c) All ion abundance's must be normalized to m/z 198, the nominal base peak, even though the ion abundance of m/z 442 may be up to 110% that of m/z 95.