Minimum Ion Abundance Requirements for Volatile Organic Analysis(a)
Effective Date: 11/01
Point of Contact: Quality Engineer for Regulatory Programs
| Mass | Ion Abundance Criteria(b) |
|---|---|
| 50 | 8.0% to 40.0% of the base peak |
| 75 | 30.0% to 66.0% of the base peak |
| 95 | Base peak, 100% relative abundance(c) |
| 96 | 5.0% to 9.0% of the base peak |
| 173 | Less than 2.0% of mass 174 |
| 174 | 50.0% to 120% of the base peak |
| 175 | 4.0% to 9.0% of mass 174 |
| 176 | 93% - 101% of mass 174 |
| 177 | 5.0% to 9.0% of mass 176 |
(a) Minimum criteria for ion abundance of the key ions should be met or exceeded.
(b) BFB is used to tune the GC/MS for volatile organic analysis based on Contract Laboratory Protocol OLM01.8 (EPA 1991) and subject to update. Laboratory procedures shall include any unique tuning requirements for analyses not covered here.
(c) All ion abundances must be normalized to m/z 95, the nominal base peak, even though the ion abundance of m/z 174 may be up to 120%.