Water and Potassium Metabisulphite Solution
Using a Water and Potassium Metabisulphite Solution for
Sulphite Additions to Your Wine
Using a
solution of potassium metabisulphite and water is a simple and
extremely accurate method of adding precise amounts of sulphite
to your wine. If you have a syringe or graduated cylinder and
a sulphite testing kit, or another way of testing the level
of sulphite in your wine, this is an excellent method of doing
your sulphite additions.
Make a 2.5%
solution by adding 25 g (4 tsp) of potassium metabisulphite
to 1 litre of cool or cold water.
| 2.5%
solution |
| ppm
free SO2 required |
ml
per litre |
ml
per 4.5 litres
(1 Imp gallon) |
ml
per 23 litres
(5 Imp gallons) |
| 10 |
1 |
3 |
15 |
| 15 |
1 |
5 |
25 |
| 25 |
2 |
8 |
40 |
| 50 |
4 |
16 |
80 |
| 100 |
7 |
32 |
160 |
Make
a 10% solution by adding 100 g (16 tsp) of potassium metabisulphite
to 1 litre of cool or cold water.
| 10%
solution |
| ppm
free SO2 required |
ml
per litre |
ml
per 4.5 litres
(1 Imp gallon) |
ml
per 23 litres
(5 Imp gallons) |
| 10 |
.18 |
.8 |
4 |
| 15 |
.26 |
1.2 |
6 |
| 25 |
.43 |
2 |
10 |
| 50 |
.87 |
4 |
20 |
| 100 |
1.75 |
8 |
40 |
This
table adapted from Ted Underhill's book "Making Better Wines".
