Formaldehyde on Rt-U-BOND

Injection
Column	Rt-U-BOND, 30 m, 0.53 mm ID, 20 µm (cat.# 19750)
Standard/Sample	Formaldehyde (manual headspace)
Inj. Vol.:	10 µL split (split ratio 10:1)
Liner:	2 mm split Precision liner w/wool (cat.# 20823)
Inj. Temp.:	200 °C
Split Vent Flow Rate:	40 mL/min
Oven
Oven Temp.:	100 °C (hold 1 min) to 150 °C at 25 °C/min (hold 3 min)
Carrier Gas	He, constant pressure (7.7 psi, 53.1 kPa)
Linear Velocity:	39 cm/sec @ 100 °C

Detector	TCD @ 200 °C
Make-up Gas Type:	He
Data Rate:	20 Hz
Sensitivity Mode:	He/H₂
Instrument	HP5890 GC
Sample Preparation	10 μL of formaldehyde solution added to a 20 mL vial and heated to 60 °C with CO₂ added to the headspace. The formaldehyde solution is at a nominal concentration of 37% by weight with 10 to 15% methanol and the remaining amount water to stabilize the formaldehyde.

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