Ss Brewing Technologies Giveaway!

 Home Brew Forums > Potassium metabisulfite math help
 LinkBack Thread Tools
07-21-2012, 11:50 AM   #1
Sammyk
Feedback Score: 0 reviews
Recipes

Join Date: Oct 2011
Location: Newton, NC
Posts: 189
Liked 9 Times on 9 Posts
Likes Given: 1

 Potassium metabisulfite math help

Can someone help? I would like to mix my kmeta in water and then add the correct amount to each gallon of wine. We age in 1 gallon carboys. So if I were to mix say 8 oz of water how much kmeta would I put in 8 oz and how much would of the solution would I add to each gallon?

__________________

07-21-2012, 08:37 PM   #2
Honda88
Feedback Score: 0 reviews
Recipes

Join Date: Jan 2012
Location: Pella, IA
Posts: 692
Liked 24 Times on 24 Posts
Likes Given: 53

1/8 tsp per gallon is what my bottle says, so I would just take a cup of water and mix 1/8 tsp then add to your gallon carboy....

__________________

07-21-2012, 08:39 PM   #3
Rodnboro
Feedback Score: 0 reviews
Recipes

Join Date: Feb 2012
Location: Statesboro, Georgia
Posts: 14

I just read a post in another forum and they mixed 2 tsp in 20 oz. of water and added 15 ml. (1/2 oz.) per gallon.

__________________

07-21-2012, 08:43 PM   #4
Yooper
Ale's What Cures You!
Feedback Score: 0 reviews

Recipes

Join Date: Jun 2006
Location: Upper Michigan
Posts: 61,061
Liked 4472 Times on 3254 Posts
Likes Given: 870

I've seen a "recipe" somewhere where you mix up the solution and use 1 teaspoon of that per gallon, but I can't find it now. A search on google may help, but I didn't find it with a quick look.

I normally use 1/4 teaspoon per 5 gallons (NOT 1/8 teaspoon per gallon!) for approximately 50 ppm of free SO2. I mix that up in some water, and rack the wine into it. I hope that helps.

I did see this on Jack Keller's site:

Calculation of Sulfur Dioxide (SO2)

Potassium metabisulfite, 1 gram = 150 ppm in 1 gallon, 30 ppm in 5 gallons
Potassium metabisulfite, ¼ teaspoon = 225 ppm in 1 gallon, 45 ppm in 5 gallons
Potassium metabisulfite, 1½ tablespoon to 1 gallon water makes ½% solution for washing equipment
Potassium metabisulfite, 2 oz. to 1 quart water makes 5% solution for sterilizing must (1 teaspoon solution per gallon of must)
1 Campden tablet contains 0.55 grams potassium metabisulfite, yielding 75 ppm SO2 to one gallon of must or wine

__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006

07-21-2012, 09:40 PM   #5
Sammyk
Feedback Score: 0 reviews
Recipes

Join Date: Oct 2011
Location: Newton, NC
Posts: 189
Liked 9 Times on 9 Posts
Likes Given: 1

I did do a Google search and could not find anything. Does this sound right? Mix 2 tsp in 20 oz. of water and added 15 ml. (1/2 oz.) per gallon?

__________________

07-21-2012, 09:42 PM   #6
Honda88
Feedback Score: 0 reviews
Recipes

Join Date: Jan 2012
Location: Pella, IA
Posts: 692
Liked 24 Times on 24 Posts
Likes Given: 53

yea my bottle says to add 100ppm its crosby and baker, maybe ill add less in the future, it seemed to work fine even adding that much before the ferment...

__________________

07-21-2012, 09:50 PM   #7
Yooper
Ale's What Cures You!
Feedback Score: 0 reviews

Recipes

Join Date: Jun 2006
Location: Upper Michigan
Posts: 61,061
Liked 4472 Times on 3254 Posts
Likes Given: 870

Quote:
 Originally Posted by Honda88 yea my bottle says to add 100ppm its crosby and baker, maybe ill add less in the future, it seemed to work fine even adding that much before the ferment...
That might be ok to sanitize must but it sure is an awful lot of sulfites otherwise, and may be perceptible in the taste. Of course, it does dissipate with time, but I think that would be enough to stress wine yeast and impact flavor a bit. I really like to use a minimum of sulfites, mostly as an antioxidant and preservative for aging wines.
__________________
Broken Leg Brewery
Giving beer a leg to stand on since 2006

 Quick Reply Message: Options Quote message in reply?
 Thread Tools

 Similar Threads Thread Thread Starter Forum Replies Last Post jimmystewart Wine Making Forum 3 08-26-2014 05:31 AM sdbrew1024 Wine Making Forum 7 02-04-2011 12:38 AM otownpyle Wine Making Forum 8 11-01-2010 03:57 PM BrewPahl Wine Making Forum 10 12-30-2009 08:50 AM madrean Wine Making Forum 10 07-28-2007 10:06 PM