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

Column | Rxi-5Sil MS, 30 m, 0.25 mm ID, 0.25 µm (cat.# 13623) |
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 |
Injection | |
Inj. Vol.: | 1 µL splitless (hold 1.5 min) |
Liner: | 5mm 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 |
Notes | Purge valve time: 1.5 min. Detector mode: full mass range 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. |
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