Campden tablets (potassium or sodium metabisulfite)[1] are a sulphur-based product that are used primarily to sterilize wine, cider and in beer making to kill bacteria and to inhibit the growth of most wild yeast. They are 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 they can be used to protect against wild yeast and bacteria without affecting flavour. Untreated cider must frequently suffers from acetobacter contamination causing vinegar spoilage. Yeasts are resistant to the tablets but the acetobacter are easily killed off, hence treatment is important in cider production.
Typical use is one crushed Campden tablet per US gallon (3.8 L) 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 (75 L) of water.[2]
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 tablets 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.[3]
Campden tablets typically contain 0.44 g each of sodium metabisulfite (plus filler) and 8 of these are equivalent to one half level teaspoon (2.5 mL) of sodium metabisulfite. Other Campden tablet formulations use potassium metabisulfite. 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.
Campden tablets are also useful in decontamination and neutralization after exposure to tear gas.[4]
The molar mass (commonly called molecular weight or MW) of potassium metabisulfite is 222 g/mol, while the molecular weight of sodium metabisulfite is 190 g/mol.
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.[5] The idea was then taken up by the Boots Co., who developed the tablet.
Some people have allergies or intolerance to sulfites. Allergies are less common than intolerance, but in rare cases may cause life-threatening anaphylactic reaction. Products containing residual amounts of sulfites, including potassium metabisulfite and sodium metabisulfite, should be labelled.
Referencesedit
^Milne, George W. A. (2005). Gardner's commercially important chemicals: synonyms, trade names, and properties. New York: Wiley-Interscience. pp. 568. ISBN0-471-73518-3.
^Palmer, John. "Home Water Treatment", Retrieved on 2009-06-04.
^E.C. Kraus "How To Stop A Fermentation", Retrieved on 2012-11-21.
^Lea, Andrew. "Origin of the Campden Tablet". Retrieved 31 December 2013.
External linksedit
Kitchen Dictionary: Campden Tablet
January 01, 1970
campden, tablet, potassium, sodium, metabisulfite, sulphur, based, product, that, used, primarily, sterilize, wine, cider, beer, making, kill, bacteria, inhibit, growth, most, wild, yeast, they, also, used, eliminate, both, free, chlorine, more, stable, form, . Campden tablets potassium or sodium metabisulfite 1 are a sulphur based product that are used primarily to sterilize wine cider and in beer making to kill bacteria and to inhibit the growth of most wild yeast They are 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 they can be used to protect against wild yeast and bacteria without affecting flavour Untreated cider must frequently suffers from acetobacter contamination causing vinegar spoilage Yeasts are resistant to the tablets but the acetobacter are easily killed off hence treatment is important in cider production Typical use is one crushed Campden tablet per US gallon 3 8 L 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 75 L of water 2 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 tablets 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 3 Campden tablets typically contain 0 44 g each of sodium metabisulfite plus filler and 8 of these are equivalent to one half level teaspoon 2 5 mL of sodium metabisulfite Other Campden tablet formulations use potassium metabisulfite 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 Campden tablets are also useful in decontamination and neutralization after exposure to tear gas 4 The molar mass commonly called molecular weight or MW of potassium metabisulfite is 222 g mol while the molecular weight of sodium metabisulfite is 190 g mol Contents 1 History 2 Health effects 3 References 4 External linksHistory editThe 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 5 The idea was then taken up by the Boots Co who developed the tablet Health effects editThis section does not cite any sources Please help improve this section by adding citations to reliable sources Unsourced material may be challenged and removed January 2023 Learn how and when to remove this message Some people have allergies or intolerance to sulfites Allergies are less common than intolerance but in rare cases may cause life threatening anaphylactic reaction Products containing residual amounts of sulfites including potassium metabisulfite and sodium metabisulfite should be labelled References edit Milne George W A 2005 Gardner s commercially important chemicals synonyms trade names and properties New York Wiley Interscience pp 568 ISBN 0 471 73518 3 Palmer John Home Water Treatment Retrieved on 2009 06 04 E C Kraus How To Stop A Fermentation Retrieved on 2012 11 21 CAinstructor com Lea Andrew Origin of the Campden Tablet Retrieved 31 December 2013 External links editKitchen Dictionary Campden Tablet Retrieved from https en wikipedia org w index php title Campden tablet amp oldid 1174052992, wikipedia, wiki, book, books, library,
