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|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)|
|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 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|
|Transfer Line Temp.:||290 °C|
|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.|