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0.50 ng/L N-Nitrosodimethylamine (NDMA) Laboratory Fortified Drinking Water Sample Extract on Rxi-5Sil MS

GC_EV1348
PeaksConc.
(ng/mL)
m/z
1.N-Nitrosodimethylamine-d61080
2.N-Nitrosodimethylamine0.02574
Sample fortified at 0.5 ng/L N-nitrosodimethylamine. Final extract concentration is 0.025 ng/mL.
ColumnRxi-5Sil MS, 30 m, 0.25 mm ID, 1.00 µm (cat.# 13653)
using Rxi guard column 10 m, 0.53 mm ID (cat.# 10073)
with SGE µ-union
Sample
Diluent:Dichloromethane
Injection
Inj. Vol.:50 µL splitless (hold 1.5 min)
Liner:Custom Premium single taper liner with 15 mg quartz wool
Inj. Temp.:275 °C
Purge Flow:100 mL/min
Oven
Oven Temp.:35 °C (hold 1.5 min) to 50 °C at 50 °C/min (hold 7.1 min) to 320 °C at 11.12 °C/min (hold 1.5 min)
Carrier GasHe, flow program
Flow Program:5.08 mL/min (hold 8.9 min) to 2.0 mL/min at 1.0 mL/min/min
DetectorMS
Mode:SIM
SIM Program:42, 43, 46, 48, 74, 80 m/z
Transfer Line Temp.:320 °C
Analyzer Type:Quadrupole
Source Type:Inert
Source Temp.:230 °C
Quad Temp.:150 °C
Solvent Delay Time:9.9 min
Tune Type:BFB
Ionization Mode:EI
InstrumentAgilent 7890A GC & 5975C MSD