Gas standard
Sparge vessel
Standard
pump
Standard pump inlet tube
Standardpumpoutlet
tube
Sample IN tube
SampleOUT tube
StandardsPreparationwith theTOGAGC
1. Attach the standardperistalticpump inlet to agas
standard; we used a tedlar bag filled with gas
standard. Thestandardpumpoutlet shouldalready
be connected to the sparge vessel.
2. Fill the sparge tubewithwater or oil, and
turnON thestandardspump (usuallyRelay
D; check the right-hand side of your GC
for your specific relay assignments).
3. Continuously pump gas
standard through the sparge
tube. Over time, it will
equilibrate; this could take up
to two hours.
5. The extracted standardwill return to the sparge tube to be regenerated for subsequent analysis.
6. Re-attach the SAMPLEOUT tube to thewaste connection, and the SAMPLE IN tube to the next
syringe.
Gas standard
Standard pump
inlet tube
Sparge
vessel
Standard pump
outlet tube
Standard
pump
SampleOUT tube
Sample IN tube
Gas
extraction
loop
4. To sample the standard you’ve
created with the tedlar bag and liquid-
filled sparge tube: attach the SAMPLE
IN andOUT tubes to the STANDARD
IN and OUT tubes on the top of the
sparge vessel.
SPARGEVESSELTOP
STANDARD IN
andOUT tubes
Standardpumpoutlet
tube connects here
Left open for venting
POPULARCONFIGURATIONGCs
TransformerOil GasAnalyzer (TOGA) GC
