Wine Analysis Home
Forms of FSO
2
(free sulphur dioxide)
FSO
2
(free sulphur dioxide) can exist as -
Molecular sulphur dioxide (MSO
2
)
Bisulphite ion (HSO
3
-
)
Sulphite ion (SO
3
-
)
The
percentage (%) concentration
of each form is determined by the
pH
of juice or wine.(see
graph
and
equations
)
