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Pesticides in QuEChERS Extract of Sweet Potato on Rxi-5Sil MS

Peaks
1.Endosulfan I
image
GC_FF01133
ColumnRxi®-5Sil MS, 20 m, 0.18 mm ID, 0.18 µm (cat.# 43602)
SampleSweet potato spiked with pesticide mix and extracted with acetonitrile and Q-sep™ QuEChERS extraction salts
Injection
Inj. Vol.:1 µL splitless (hold 1 min)
Liner:Gooseneck splitless (4 mm) w/deact. wool (cat.# 22405)
Inj. Temp.:250 °C
Purge Flow:40 mL/min
Oven
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
DetectorTOFMS
Transfer Line Temp.:300 °C
Analyzer Type:TOF
Source Temp.:225 °C
Electron Energy:70 eV
Mass Defect:-20 mu/100 u
Solvent Delay Time:3 min
Tune Type:PFTBA
Ionization Mode:EI
Scan Range:45 to 550 amu
Scan Rate:10 scans/sec
InstrumentLECO Pegasus III GC-TOFMS
NotesSample:
A. 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
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RELATED CHROMATOGRAM LIBRARY SEARCHES

dispersive solid phase extract

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PSA

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Fruits and Vegetables

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Food

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rxi5silms

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QuEChERS

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