Previous Oxidation or Sulfite Research
Posted: Wed Apr 06, 2016 8:58 am
Use this thread to catalog old forum threads, articles, chapters, blogs, etc. where someone tried sulfites in the mash, boil or packaging. This will give us quick references for any future cations needed.
From Dr. George Fix in HBD # 1047
"Negative effects due to HSA are usually reflected in a flavor the
Germans call "Herbstoffe." Roughly translated this means "grain bitter"
or "grain astringency."
There are some theoretical considerations which suggest HSA should
be a nonissue. Ironically, the same issues arise in a project I am
currently working on which involve beers very far removed in character
from Lambics. Herbstoffe arises from the presence of what could be
called HSA aldehydes. These in turn arise from the interaction of
ethanol in beer (as well as some other things) and products which were
oxidized on the hot side of wort production. The HSA aldehydes have
been isolated, and definitely display "grain astringent" flavors.
Moreover, it has also been shown that most Saccharomyces will ignore
them. Thus, in most beers, if present, they will spill over into the
finished beer and display Herbstoffe."
From Dr. George Fix in HBD # 1047
"Negative effects due to HSA are usually reflected in a flavor the
Germans call "Herbstoffe." Roughly translated this means "grain bitter"
or "grain astringency."
There are some theoretical considerations which suggest HSA should
be a nonissue. Ironically, the same issues arise in a project I am
currently working on which involve beers very far removed in character
from Lambics. Herbstoffe arises from the presence of what could be
called HSA aldehydes. These in turn arise from the interaction of
ethanol in beer (as well as some other things) and products which were
oxidized on the hot side of wort production. The HSA aldehydes have
been isolated, and definitely display "grain astringent" flavors.
Moreover, it has also been shown that most Saccharomyces will ignore
them. Thus, in most beers, if present, they will spill over into the
finished beer and display Herbstoffe."