Percentage-Active Solid Additions
DAP = about 21% YAN (Yeast Assimilable Nitrogen)
PMS = 57% SO2 by mass
Details: This calculator is for use with solids of which only a certain percentage is active. From the percentage, the desired addition level, and the volume of the juice/wine, the calculator will provide the mass of solid to add.
This is essentially the same as the solid addition calculation, except that the result is divided by the fraction of the solid that is active:
mass-to-add = (desired-concentration * volume ) / (percentage-active / 100)
VinoCalc by Jonathan Musther - firstname.lastname@example.org