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- Q5028247 subject Q8521146.
- Q5028247 subject Q8824855.
- Q5028247 subject Q8966428.
- Q5028247 abstract "Campden tablets (potassium or sodium metabisulfite) are a sulfur-based product that is used primarily to sterilize wine, cider and beer making to kill bacteria and to inhibit the growth of most wild yeast: this product is also used to eliminate both free chlorine, and the more stable form, chloramine, from water solutions (e.g., drinking water from municipal sources). Campden tablets allow the amateur brewer to easily measure small quantities of sodium metabisulfite, so it can be used to protect against wild yeast and bacteria without affecting flavour.Typical use is one crushed Campden tablet per US gallon of must or wort. This dosage contributes 67 ppm sulfur dioxide to the wort but the level of active sulfur dioxide diminishes rapidly as it reacts with chlorine and chloramine, and with aldehydes (particularly in wine). Therefore, the concentration of free sulfur dioxide is greatly diminished by the time the beer or wine is consumed. However, when used only for the purpose of dechlorinating tap water before brewing, one tablet will effectively treat 20 US gallons of water.Campden tablets are also used as an anti-oxidizing agent when transferring wine between containers. The sodium metabisulfite in the Campden tablets will trap oxygen that enters the wine, preventing it from doing any harm.It is a common misconception that Campden tablet can be used to halt the ferment process in wine before all the available sugars are converted by the yeast, hence controlling the amount of residual sweetness in the final product. This however is not true. In order to halt fermentation, enough Campden tablets would have to be added to render the wine undrinkable. Alternatively, when used in conjunction with potassium sorbate, the yeast population will be greatly reduced and prevented from reproducing. Without the addition of potassium sorbate the yeast population will only be stunned and eventually repopulate if provided with enough fermentable sugars.Campden tablets typically contain 0.44 g each of sodium metabisulfite (plus filler) and 10 of these are equivalent to one level teaspoon of sodium metabisulfite. Other related substances are sodium/potassium sulfite/bisulfite. Further complicating the subject, each is also referred to interchangeably as—sulfites, and the 'bi' can be found as 'di'. In terms of usage, sodium thiosulfate is a closely related compound.The name Campden tablet comes from the town of Chipping Campden in Gloucestershire, England, where the original solution was developed in the 1920s by the Fruit and Vegetable Preserving Research Station - now Campden BRI. The idea was then taken up by the Boots Co., who developed the tablet.Campden tablets are also useful in decontamination and neutralization after exposure to tear gas.The molar mass (commonly called molecular weight or MW) of potassium metabisulfite is 222 grams per mole, while the molecular weight of sodium metabisulfite is 190 g/mol.".
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- Q5028247 wikiPageWikiLink Q8521146.
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- Q5028247 wikiPageWikiLink Q8824855.
- Q5028247 wikiPageWikiLink Q8966428.
- Q5028247 comment "Campden tablets (potassium or sodium metabisulfite) are a sulfur-based product that is used primarily to sterilize wine, cider and beer making to kill bacteria and to inhibit the growth of most wild yeast: this product is also used to eliminate both free chlorine, and the more stable form, chloramine, from water solutions (e.g., drinking water from municipal sources).".
- Q5028247 label "Campden tablet".