[Bacchus69]

Hi Mark,

Hope you are still around. After reading this post I decided to buy an Orion 301 to do my SO2 tests. My reds are too dark sometimes to see the color change so I hope this will help. I am still waiting to receive my new old pH analogs meters, but I have already a few questions. I would like to "tune" mine as well so I can see more easily the results and I hope you can help me with that. Also, can I include the starch and see both mV and change of color if I do it in H2O?
Thanks a lot

Ariel

[Arkcon]

Starch won't likely interfere with the conductivity.  You might want to try it with a white, or a sample of sulfite in water.  That way, you can see if its working.  Warning:  The endpoint can be slightly different with the two methods.  That's why we always start with a standard run, to guage our method.