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Peaks | tR (min) | Conc. (ng/mL) | Parent Ion | Product Ion | Collision Energy | |
---|---|---|---|---|---|---|
1. | cis-Permethrin | 7.82 | 90 | 183 | 153 | 12 |
2. | trans-Permethrin | 7.86 | 90 | 183 | 153 | 12 |
Column | Low-pressure GC column kit (factory-coupled restrictor column [5 m x 0.18 mm ID] and Rtx-5ms analytical column [15 m, 0.53 mm ID, 1 µm plus 1 m integrated transfer line on the outlet end]) (cat.# 11800) |
---|---|
Standard/Sample | QuEChERS performance standards kit (cat.# 31152) |
Diluent: | Acetonitrile |
Conc.: | 9 µg/mL |
Injection | |
Inj. Vol.: | 1 µL split (split ratio 100:1) |
Liner: | Topaz 4.0 mm ID single taper inlet liner w/ wool (cat.# 23447) |
Inj. Temp.: | 250 °C |
Oven | |
Oven Temp.: | 70 °C (hold 1 min) to 320 °C at 35 °C/min (hold 5 min) |
Carrier Gas | He, constant flow |
Flow Rate: | 2 mL/min |
Detector | TSQ 8000 |
---|---|
Transfer Line Temp.: | 290 °C |
Analyzer Type: | Quadrupole |
Source Temp.: | 325 °C |
Solvent Delay Time: | 2 min |
Instrument | Thermo Scientific TSQ 8000 Triple Quadrupole GC-MS |
Sample Preparation | The spinach matrix was prepared from 10 g of homogenized spinach extracted with QuEChERS EN salts (cat.# 25849) and cleaned up with dSPE containing magnesium sulfate, PSA, C18-EC, and GCB (cat.# 26219). The matrix extract was then spiked with 30 μL of each of the QuEChERS performance mixes for a final concentration of 9 ppm, and the internal standard triphenyl phosphate (TPP) was added at a final concentration of 10 ppm. |
Notes | Between the first and last run, 500 injections of spinach extract spiked with internal standard (TTP) were made. |
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