Pesticides in QuEChERS Extract of Sweet Potato on Rxi®-5Sil MS
| Peaks | |
|---|---|
| 1. | Endosulfan I |
GC_FF01133
| Column | Rxi®-5Sil MS, 20 m, 0.18 mm ID, 0.18 µm (cat.# 43602) |
| Sample | Sweet 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 Gas | He, constant flow |
| Flow Rate: | 1.2 mL/min |
| Detector | TOFMS |
| 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 |
| Instrument | LECO Pegasus III GC-TOFMS |
| Notes | Sample: 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 |
