I went through what you are doing last summer. I have a Costech EA and a ConFlo IV.
I did what Gilles suggested in 2c. I had a challenge in venting the SO2 because I do not have a hood in my lab. I ended up making an SO2 scrubber out of a plastic bucket filled with permanganate granules designed to scrub SO2. If you would like details, please let me know. I also bought a Honeywell Gas Alert SO2 sensor to tell me whether the system was working.
I hope this is helpful,
Sam C. Wainright, Ph.D.
Professor of Marine Science
Dept. of Science
U.S. Coast Guard Academy
27 Mohegan Ave.
New London, CT 06320
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf Of Gilles St-Jean
Sent: Monday, January 07, 2013 8:34 AM
To: [log in to unmask]
Subject: Re: [ISOGEOCHEM] SO2 reference gas installation
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
Scientifique en Recherche et Développement / Research and Development Scientist Université d'Ottawa / University of Ottawa Sciences de la Terre / Earth Sciences Pavillon / MacDonald / Hall
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Tel: 1-613-562-5800 xt 6830 (Bureau / Office) Téléc. / Fax: 1-613-562-5192 Courriel / E-mail: [log in to unmask] "You can please some of the people all of the time, and all of the people some of the time, but you can not please all of the people all of the time". Mod. from Abraham Lincoln (attributed); 16th US president (1809 - 1865)
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