As it relates to the calculation of SO2 addition for the must, I feel like I've come across conflicting information between 2 different sources- the More Wine Redwine Guide Manual & the Winemakers Answer book by Alison Crow.
-->Morewine Guide states that .33grams per 1 gallon equates to 50ppm.
-->Winemakers answer book states 50mg/L to "must or juice".
Using Morewine- 50 gallons * .33grams = 16.5grams of SO2
Using the Winemaker Answer book- 50 gallons * 3.785 = 189 liters
..189liters*50mg = 9450mg/1000= 9.45mg
1 calculation yields 16.5grams & the other is roughly 40% lower at 9.45grams.
Am I doing something wrong here?
-->Morewine Guide states that .33grams per 1 gallon equates to 50ppm.
-->Winemakers answer book states 50mg/L to "must or juice".
Using Morewine- 50 gallons * .33grams = 16.5grams of SO2
Using the Winemaker Answer book- 50 gallons * 3.785 = 189 liters
..189liters*50mg = 9450mg/1000= 9.45mg
1 calculation yields 16.5grams & the other is roughly 40% lower at 9.45grams.
Am I doing something wrong here?