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EPA 522 Analyte Mix on Rtx-624 w/5 m Integra-Guard (30 m x 0.25 mm x 1.4 μm)

GC_EV1250
PeakstR (min)
1.Tetrahydrofuran-D85.59
2.1,4-Dioxane-d86.51
3.1,4-Dioxane6.55
ColumnRtx-624 w/5 m Integra-Guard, 30 m, 0.25 mm ID, 1.40 µm (cat.# 10968-124)
Standard/SampleTetrahydrofuran-d8 (cat.# 30112)
1,4-Dioxane-d8 (cat.# 30614)
1,4-Dioxane (cat.# 30287)
Diluent:Dichloromethane
Conc.:50 ng/mL
Injection
Inj. Vol.:10 µL splitless (hold 1 min)
Liner:Premium 4 mm single taper w/wool (cat.# 23303.5)
Inj. Temp.:120 °C
Purge Flow:80 mL/min
Oven
Oven Temp.:35 °C (hold 1 min) to 120 °C at 12 °C/min (hold 1 min)
Carrier GasHe, constant flow
Flow Rate:1.4 mL/min
Linear Velocity:30.556 cm/sec @ 35 °C
DetectorMS
Mode:SIM
SIM Program:
GroupStart Time
(min)
Ion(s) (m/z)Dwell (ms)
15.246, 78, 80 50
26.396, 88, 64, 62, 58 75
Transfer Line Temp.:280 °C
Analyzer Type:Quadrupole
Source Temp.:230 °C
Quad Temp.:150 °C
Solvent Delay Time:5.2 min
Tune Type:BFB
Ionization Mode:EI
InstrumentAgilent 7890A GC & 5975C MSD
NotesLarge volume splitless injection for EPA Method 522 without a PTV and without a press-fit connector for the retention gap.
AcknowledgementM. Misselwitz, J. Cochran