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Sulphiting 10 000 L of must to 0.5 mg/L molecular SO₂

Enter the pH and required molecular SO₂ to convert it into free SO₂ and the metabisulphite dose for your volume.

Parameters

Result

Approximate calculation using a simplified model: for designing equipment and process modes, consult a technologist.

Calculation example

Wine volume
10 000 l
Wine pH
3,20
Free SO₂ now
0 mg/L
What is known
I want a given molecular SO₂
Required molecular SO₂
0.5 mg/L (dry reds)
Potassium metabisulphite to add
221,8 g
SO₂ to add
12,8 mg/L
That is of a 10 % metabisulphite solution
2 218 ml
Free SO₂ after the addition
12,8 mg/L
Molecular SO₂ after the addition
0,50 mg/L
Share of active SO₂
3,9 %

Frequently asked questions

What share of potassium metabisulphite is SO₂?
About 57 % by mass: each gram of metabisulphite gives about 0.57 g of SO₂.

The calculations are approximate: they help to assess the process and compare options, but do not replace a process design and trials on a specific raw material. This section is for reference only and contains no commercial offers.