FSO2 to MolecularSO2 Addition based on molecular targetSO2 ReductionSO2 addition as Liquefied GasSO2 addition as Liquid SolutionSO2 addition as KMBSStrength of SO2 solution

Required SO2 to add considering current FSO2, pH and desired molecular FSO2 target

Purpose

Use this calculator to determine the amount of SO2 to add in order to achieve a desired molecular SO2 target.

Background

This calculator will calculate the level of molecular SO2 in a wine based on its pH and measured free SO2. The required level of molecular SO2 for antimicrobial protection is often given as 0.8mg/L, although sometimes can be up to 1.5mg/L.
In red wines, most of the 'free' SO2 is actually pigment (anthocyanin) bound, and is released by acidification of the sample prior to measurement. Due to this it is not possible to ascertain the level of molecular SO2 in red wines. Red wines are however, generally far more microbial stable than whites, and thus are typically maintained at lower levels of free SO2. In summary, maintaining high molecular SO2 in red wines is difficult and not advised - do not use this calculator as a guide for red wines.

REFERENCES:

  • Wine Science: Principles and Applications (2008) by Ron Jackson - (Academic Press);

This winemaking calculator is provided to you courtesy of NuVerge Canada Inc.

Disclaimer

Winemaker.Plus calculators purpose is to provide an alternative to user's current method(s). In making any additions or estimating winemaking data, we are strongly urging the user to respect all legislative requirements, follow regulatory health and safety protocols and make additions or estimate winemaking data based on number of sources including and not limited to supplier technical sheets, MSDS's and or local appellation resources. In no event shall Winemaker.Plus or its employees be liable for any direct or/and indirect loss and/or damage arising from the use or/and missuse of calculators in this progressive web application. Winemaker.Plus makes no representation, warranty, or claim that the information available in any of the calculators of this progressive web application is current or accurate. WinemakerPlus is not responsible for any errors or omissions in the resources or information contained in this progressive web application.