Free Sulfur Dioxide (SO2)


Sulfur dioxide is a chemical compound that acts as a preservative; counteracting the effects of oxidation and prevention of microbial growth. The measurement of free sulfur dioxide is used to determine the amount of SO2 that is not bound to other molecules and is still available to continue to act as a preservative.

Free Sulfur Dioxide (SO2)
(Units: mg/L, Technique: Aeration Oxidation)