QuEChERS Extract of Cannabis on Rxi-17Sil MS and Rxi-5ms by GCxGC-TOFMS (Zoomed in on cannabinoids region)

ColumnRxi-17Sil MS 30 m, 0.25 mm ID, 0.25 µm (cat.# 14123)
Rxi-5ms 0.9 m, 0.18 mm ID, 0.18 µm,
Inj. Vol.:1 µL split (split ratio 20:1)
Liner:Premium 4 mm Precision Inlet Liner w/Wool (cat.# 23305.1)
Inj. Temp.:275 °C
Oven Temp.:Rxi-17Sil MS: 40 °C (hold 1 min) to 320 °C at 5 °C/min (hold 3 min)
Rxi-5ms: 45 °C (hold 1 min) to 325 °C at 5 °C/min (hold 3 min)
Carrier GasHe, corrected constant flow (2 mL/min)
Modulator Temp. Offset:20 °C
Second Dimension Separation Time:2 sec
Hot Pulse Time:0.6 sec
Cool Time between Stages:0.4 sec
Transfer Line Temp.:310 °C
Analyzer Type:TOF
Source Temp.:250 °C
Electron Energy:70 eV
Mass Defect:-20 mu/100 u
Solvent Delay Time:4.5 min
Tune Type:PFTBA
Ionization Mode:EI
Acquisition Range:45-500 amu
Spectral Acquisition Rate:200 spectra/sec
InstrumentLECO Pegasus 4D GCxGC-TOFMS
NotesSample Preparation:
Sample: Up to 2 g of finely ground cannabis in a 50 mL polypropylene centrifuge tube.

Extraction: Add 10 mL acetonitrile and 10 mL of organic-free water, then shake thoroughly. Soak 1 hour, then aggressively vortex 30 minutes. Add Q-sep packet (cat.# 26235), shake 1 minute, then centrifuge 5 minutes at 3,000 g with Q-sep 3000 centrifuge (cat.# 26230).
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