Introduction to Low Oxygen Brewing

[PORTERHAUS]

There shouldn't be any left in the finished beer, unless the yeast produced it.  During oxygenation all the remaining sulfite should get used up before fermentation.

I don't know about temp dependence, I hope not.

So there isn't a measurable correlation between left over sulfites from SMB and Sulfur character in the finished beer?

[natebrews]

I'm just saying that the sulfite should be gone at the end of oxygenation, you might have other sulfur compounds in there (sulfate for example) that are detectable though.  If you don't use up the sulfite with oxygenation, then I think you are more likely to have the yeast interact with it and produce unpleasant sulfur compounds. 

I believe this is how I have ended up with a couple fart beers.

[PORTERHAUS]

I see, I haven't experienced any issues with Sulfur...that I know of, I have only done a couple LODO trials. I will be getting my strips this weekend, so was curious to test say a finished batch of beer. Thanks for the reply.

[brewinhard]

I'm just saying that the sulfite should be gone at the end of oxygenation, you might have other sulfur compounds in there (sulfate for example) that are detectable though.  If you don't use up the sulfite with oxygenation, then I think you are more likely to have the yeast interact with it and produce unpleasant sulfur compounds. 

I believe this is how I have ended up with a couple fart beers.

I have been slowly dialing back my SBT amounts because of this as well. Not fart beers, but noticeable sulfur in the finished product. I am assuming it is from not properly expending all the remaining sulfites after the boil from a large enough dose of oxygen at pitching time. Currently I am working with 20 ppm, but will dial back to 15 ppm on my next round of brews to see if I can eliminate any sulfur issues.

[Andor]

Does using campden tablets to remover chlorine/chloramine factor in the SMB dosage rates?

[brewinhard]

Does using campden tablets to remover chlorine/chloramine factor in the SMB dosage rates?

I would say no, but it probably depends on how early you are adding the tablets to do their thing. If they are added the night before, any oxygen scavenging from the SMB would already be used up by the time you heat your strike water.