PRINCIPLE
The SO2 is completely released in acid medium and titrated with the standard iodide/iodate solution in the presence of a starch indicator. Total acidity is neutralized by a standard solution of sodium hydroxide and a pH indicator.
This complete kit enables to quickly estimate free SO2 and total acidity. It contains a volumetric graduated flask, a standard solution and a reagent for each test.
The SO2 is completely released in acid medium and titrated with the standard iodide/iodate solution in the presence of a starch indicator. Total acidity is neutralized by a standard solution of sodium hydroxide and a pH indicator.