Permanent Gases on Capillary Rt-MSieve 5A

Injection
Column	Rt-Msieve 5A, 30 m, 0.32 mm ID, 30 µm (cat.# 19722)
Standard/Sample	Permanent gas standard
Diluent:	Helium
Inj. Vol.:	50 µL split (split ratio 20:1)
Liner:	Topaz 2.0 mm ID straight inlet liner (cat.# 23313)
Inj. Temp.:	150 °C
Oven
Oven Temp.:	40 °C (hold 13 min)
Carrier Gas	He, constant flow
Flow Rate:	2.5 mL/min

Detector	TCD @ 200 °C
Make-up Gas Flow Rate:	10 mL/min
Make-up Gas Type:	He
Instrument	Agilent 7890B GC
Notes	Baseline resolution between argon and oxygen is obtained using split injection. (R(Ar/O₂) = 1.8) Note that the sample was introduced onto the column using syringe injection and a high split ratio, which results in a very narrow sample band. Any dead volume in the system (e.g., from using a sampling valve, large sampling loops, or even from using splitless injection) will result in peak broadening, which might decrease resolution between the peaks or even result in peak coelution.

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