pp wrote:
> On Jan 11, 2:39 am, "Pino" > wrote:
> > How does one calculate how to add 20-40ppm of SO2?
>
> Guy's answer gives you the exact amount.
> Pp

Wrong pp! I gave the right solution but the wrong answer.
For 23 liters, to get 40 ppm (parts per million) =
(40 mg/l x 23 l)/(0.57) = 1614 mg or 1,61 grams of potassium
metabisulphite salt.

Easier solution is 40g x 23 l /570 = 1,61 g

Guy