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Incurred Cypermethrins in a QuEChERS Extract of Marijuana by GCxGC on Rxi-5Sil MS and Rtx-200

Incurred Cypermethrins in a QuEChERS Extract of Marijuana by GCxGC on Rxi®-5Sil MS and Rtx®-200

PeaksRT 1 (sec.)RT 2 (sec.)
1.Cypermethrin 122921.50
2.Cypermethrin 223041.54
3.Cypermethrin 323101.53
4.Cypermethrin 423131.58
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GC_FF1203
ColumnRxi®-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 GasHe, 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
DetectorTOFMS
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
InstrumentLECO Pegasus® 4D GCxGC-TOFMS
NotesRtx®-200 (cat.# 15020) is a 15 m column. A 1.3 m section was used as the second dimension column.
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