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Incurred Cypermethrins in a QuEChERS Extract of Marijuana by GCxGC on Rxi-5Sil MS and Rtx-200
Peaks | RT 1 (sec.) | RT 2 (sec.) | |
---|---|---|---|
1. | Cypermethrin 1![]() | 2292 | 1.50 |
2. | Cypermethrin 2![]() | 2304 | 1.54 |
3. | Cypermethrin 3![]() | 2310 | 1.53 |
4. | Cypermethrin 4![]() | 2313 | 1.58 |

GC_FF1203
Column | Rxi-5Sil MS 30 m, 0.25 mm ID, 0.25 µm (cat.# 13623) |
Rtx-200 1.3 m, 0.25 mm ID, 0.25 µm (cat.# 15020) | |
Sample | |
Diluent: | Toluene |
Injection | |
Inj. Vol.: | 1 µL splitless (hold 1 min) |
Liner: | Premium 4mm Single Taper w/Wool (cat.# 23303.1) |
Inj. Temp.: | 250 °C |
Purge Flow: | 40 mL/min |
Oven | |
Oven Temp.: | Rxi-5Sil MS: 80 °C (hold 1 min) to 310 °C at 5 °C/min Rtx-200: 85 °C (hold 1 min) to 315 °C at 5 °C/min |
Carrier Gas | He, corrected constant flow (2 mL/min) |
Modulation | |
Modulator Temp. Offset: | 20 °C |
Second Dimension Separation Time: | 3 sec |
Hot Pulse Time: | 0.9 sec |
Cool Time between Stages: | 0.6 sec |
Detector | TOFMS |
Transfer Line Temp.: | 290 °C |
Analyzer Type: | TOF |
Source Temp.: | 225 °C |
Electron Energy: | 70 eV |
Mass Defect: | -20 mu/100 u |
Solvent Delay Time: | 5 min |
Tune Type: | PFTBA |
Ionization Mode: | EI |
Acquisition Range: | 45-550 amu |
Spectral Acquisition Rate: | 100 spectra/sec |
Instrument | LECO Pegasus 4D GCxGC-TOFMS |
Notes | Rtx-200 (cat.# 15020) is a 15 m column. A 1.3 m section was used as the second dimension column. |
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