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Sulfite: Difference between revisions
→Oxygen Scavenging in Beer
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Because sulfite plays such an important role in preventing oxidation, [[SO2 testing]] should be utilized to track sulfite consumption. This information can be used to optimize the sulfite usage rate (which most brewers want to minimize). It is suggested to target a 5ppm free SO<sub>2</sub> level at the end of the hot side process (up until aeration or oxygenation), which provides a margin of safety without being excessive. Because sulfite acts as a surrogate marker for oxygen exposure, tracking when and how much of it is consumed can help identify procedural areas that need improvement with regard to oxygen exposure. | Because sulfite plays such an important role in preventing oxidation, [[SO2 testing]] should be utilized to track sulfite consumption. This information can be used to optimize the sulfite usage rate (which most brewers want to minimize). It is suggested to target a 5ppm free SO<sub>2</sub> level at the end of the hot side process (up until aeration or oxygenation), which provides a margin of safety without being excessive. Because sulfite acts as a surrogate marker for oxygen exposure, tracking when and how much of it is consumed can help identify procedural areas that need improvement with regard to oxygen exposure. | ||
Short term measures adopted by breweries, to minimize the entry of these aldehydes into fermenting wort, is the addition of carbonyl-complexing agents like potassium metabisulphite (KMS) at the lautering and wort boiling stages. The role of sulphur dioxide (from KMS) in slowing down the formation of stale carbonyl compounds in beer has been widely reported (Nordlo¨r & Winell 1983; Bamforth et al. 1993; Ilett 1995). As current brewing practice is tending towards a clean label, the continued usage of KMS in the future remains doubtful.<ref>EtokAkpan | |||
OU. [https://link.springer.com/article/10.1023/B:WIBI.0000043169.65135.b4 Preliminary study of fat oxidation in sorghum and maize brewing.] ''World J Microbiol Biotechnol.'' 2004;20:569–573.</ref> | |||
'''Instructions:''' | '''Instructions:''' | ||