Table 2.
Selected ion and associated signal-to-noise ratio (S/N) for trace level detection (deposited mass) of select inorganic oxidizers using negative mode JHTD-DART-MS in full scan mode (m/z 30 to m/z 500) with system parameters, Vapur: 4.5 L min−1, orifice 1 voltage (in-source CID): −20 V, N2 gas, 5.5 s burst of 3.25 A. S/N ratios and uncertainty expressed as the average and standard deviation of five replicate measurements
| Compound | Ion observed | m/z | Mass (ng) | S/N |
|---|---|---|---|---|
| Ammonium nitrate (AN) | (HNO3)NO3− | 125 | 10 | 28 ± 15 |
| Calcium ammonium nitrate (CAN) | (HNO3)NO3− | 125 | 20 | 49 ± 13 |
| Potassium chlorate (PC) | ClO3− | 83 | 1 | 42 ± 26 |
| Potassium perchlorate (PPC) | ClO3− | 83 | 2 | 34 ± 6 |
| Potassium nitrite (PN) | (HNO2)NO2− | 93 | 100 | 25 ± 15 |