You have a few options for this.
1) If you have a dual-inlet, then this is simple. Get some clean SO2 and add about 75 to 150 micromoles of SO2 to a side of the inlet and run for your ref pulses for a few days before you need to change for a fresh aliquot.
2) Depending on the version of interface you have:
a) ConFlo II: You will need to either replace one of the brass regulators for a stainless steel one with a stick-on heater and supply (I don't know the wattage used), or build a separate box with a SS regulator and heater and attach its own capillary to the ConFlo II via a dual hole ferrule to one of the existing Ref actuators.
b) ConFlo III: Use the stainless steel regulator along with the heater power supply provided for this regulator. In the ConFlo III, it is either Ref1 or Ref2 (I forget, see manual)
c) ConFlo IV: It is clearly marked which regulator to use and came with a heater power supply as well.
You will need to vent the SO2 to a hood with a nederman arm or similar
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De : Stable Isotope Geochemistry [mailto:[log in to unmask]] De la part de Suzan Verdegaal
Envoyé : 7 janvier 2013 06:27
À : [log in to unmask]
Objet : [ISOGEOCHEM] SO2 reference gas installation
We are trying to set up the Flash to be able to measure d34S for a long time. First attempts gave good results, but since we now have to find a permanent solution for having SO2 in our lab we are struggling. The person who is responsible for handing and installing gasses suggests a very expensive setup. This will make it possible to flush the whole system (from gass-bottle to Conflo) automatically. We are now wondering if this is really necessary and if there maybe is a standard method for using SO2 as a ref-gas.
It would be really helpful to hear the experiences of other users of SO2 gas.
Thanks in advance.
Lab Manager Stable isotope lab.
Faculty of Earth and Life sciences
Free Universtity Amsterdam