Table 1.
Optimized GC-MS parameter settings for analysis of CS2
| Parameter | Settings |
|---|---|
| GC parameters | |
| Injector temperature | 150 °C |
| Split injection | Split ratio 20:1 (split flow 22.066 ml/min) |
| Carrier flow | He, 1.1 ml/min |
| Injector conditions | Temperature program: 70 °C hold 0.1 min, ramp at 450 °C/min to 325 °C, hold 2 min, cool at 10 °C/min to 250 °C. |
| Injection volume / mode | 2 ml / split ratio 20:1 |
| Column conditions (run) | Temperature program of 14 min: 40 °C hold 5 min, ramp at 40 °C / min to 200 and hold for 5 min |
| Column conditions (post run) | Post-run program of 10 min at 310 °C: Mid-column back flush, with inlet pressure at 2 psi, backflush column flow − 2.553 ml/min, and onward column flow 2.967 ml/min. |
| MS parameters | |
| Source temperature | 230 °C |
| Ionization / electron energy | Electron ionization (EI) / 70 eV |
| Detector voltage | 1500 V |
| Ion source temperature | 230 °C |
| Damping gas flow | 0.6 ml/min |
| Emission current | 250 µA |
| MS analysis | Selected ion monitoring (SIM), m/z 76 and 78 with unit resolution and dwell time 200 ms |