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Permanent Gases on Capillary Rt-MSieve 5A
|Peaks||tR (min)||Conc. mol %|
|Column||Rt-Msieve 5A, 30 m, 0.32 mm ID, 30 µm (cat.# 19722)|
|Sample||Permanent gas standard|
|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 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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