Carfentrazone Ethyl in Dandelion Root Powder (Dietary Supplement) on Rxi-5Sil MS

Injection
Column	Rxi-5Sil MS, 30 m, 0.25 mm ID, 0.25 µm (cat.# 13623)
Standard/Sample	Dandelion root powder spiked with 46 pesticides
	QuEChERS internal standard mix for GC/MS analysis (cat.# 33267)
	Anthracene for quality control (cat.# 33264)
Diluent:	Toluene
Conc.:	80 pg/µL
Inj. Vol.:	1 µL splitless (hold 1.5 min)
Liner:	5 mm Splitless with wool (cat.# 22975-200.1)
Inj. Temp.:	250 °C
Oven
Oven Temp.:	90 °C (hold 1.5 min) to 340 °C at 8 °C/min
Carrier Gas	He, constant flow
Flow Rate:	1.5 mL/min

Detector	MS
Mode:
Analyzer Type:	TOF
Source Temp.:	225 °C
Electron Energy:	70 eV
Ionization Mode:	EI
Acquisition Range:	45-550 amu
Spectral Acquisition Rate:	5 spectra/sec.
Instrument	LECO Pegasus 4D GCxGC-TOFMS
Sample Preparation	Wetting: 1 g of dandelion root powder combined with 9 mL of water, shaken well, fortified with pesticides and QuEChERS internal standard mix for GC/MS analysis (cat.# 33267), soak for 2 hours. Extraction: 10 mL acetonitrile added then addition of Q-sep Q110 (cat.# 26213), centrifuge with Q-sep 3000 centrifuge (cat.# 26230). cSPE: add control standard anthracene (cat.# 33264) to 1 mL extract, add magnesium sulfate to cartridge, use 6 mL combo SPE cartridge containing 500 mg CarboPrep 90/500 mg PSA (cat.# 26194), concentrate via evaporation.
Notes	Purge valve time: 1.5 min Detector mode: full mass range

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