Wine Math: Sulfur Dioxide Additions

In this video, Jennie Savits will go over example calculations for adding sulfur dioxide (SO2) to wine by way of potassium metabisulfite (KMBS). SO2 is used in winemaking to prevent against oxidation and microbial spoilage.
email: [e-mail]
website: www.extension.iastate.edu/wine
0:00 Intro
0:25 Background on sulfur dioxide
2:09 Notes on units
3:32 Info needed and equation for calculation
7:40 Example #1
12:49 example #2

[@Dave-by1rq]

This was a excellent explanation. I have really struggled with these equations and this made things extremely easy to understand. Thank you so much!

[@BuckslnSix]

Hi, the total limits differ in every country really, but 350 as a max is only allowed in sweet wines in some countries. 150 for reds and 200 for whites is the most common, cheers.

[@juniorCheers]

Excellent explanation and easy to follow. Thanks!

[@user-qx5se7hj2x]

Thanks

[@troyclosser6256]

Amazing, thank you

[@user-qx5se7hj2x]

👍

[@JM-uk9yb]

Really helpful my only question is how to you determine free SO2 in wine? Like how do you calculate it before you do the additions

[@midwestgrapeandwineindustr4763]

You need to measure the Free SO2 in the wine. There are a number of methods. Check out the lunch and learn series video for SO2 methods ua-cam.com/video/nU7L4nto4Ag/v-deo.htmlsi=LX9Xrtr5Ev8CHLA2