Welcome to the New Restek.com! Take a tour of the new site and feel free to send us your feedback.
Your web browser will no longer be supported by Restek.com as of 30 June 2021.
To avoid any interruption in access or functionality, install a current-generation web browser now. Learn more.

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

GC_FF1125
ColumnRxi®-5Sil MS, 20 m, 0.18 mm ID, 0.18 µm (cat.# 43602)
Samplesweet potato spiked with pesticide mix, extracted with acetonitrile and Q-sep™ Q110 QuEChERS extraction tube (cat.# 26213)
Diluent:Acetonitrile
Injection
Inj. Vol.:1 µL splitless (hold 1 min)
Liner:Gooseneck Splitless (4mm) w/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:45-550 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™ Q250 QuEChERS dSPE clean-up tube
(cat.# 26124), acidified with formic acid to pH 5

m/z plotted: 60, 73, 87, 129, 256