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|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 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|
|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.|