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Pesticides on Sweet Potato With and Without QuEChERS dSPE Cleanup on Rxi-5Sil MS

ColumnRxi-5Sil MS, 20 m, 0.18 mm ID, 0.18 µm (cat.# 43602)
Standard/SampleSweet potato spiked with pesticide mix and extracted with acetonitrile and Q-sep QuEChERS EN Method 15662 extraction salts
Inj. Vol.:1.0 µL splitless (hold 1 min)
Liner:Single taper (4 mm) w/deact. wool (cat.# 22405)
Inj. Temp.:250 °C
Oven Temp.:72.5 °C (hold 1 min) to 350 °C at 20 °C/min
Carrier GasHe, constant flow
Flow Rate:1.2 mL/min
Transfer Line Temp.:300 °C
Analyzer Type:TOF
Ionization Mode:EI
Acquisition Range:45-550 amu
InstrumentAgilent/HP6890 GC
Sample PreparationA. Extract (without cleanup step) acidified with formic acid to pH 5.
B. Extract with cleanup using Q-sep QuEChERS dSPE cleanup tube (cat.# 26124) acidified with formic acid to pH 5.
Notesm/z 60, 73, 87, 129, 256 plotted