Dictionary entry overview: What does isle mean? â¢ ISLE (noun) The noun ISLE has 1 sense: 1. a small island Familiarity information: ISLE used as a noun is very rare.
The sulfate ion is SO42- The sulfite ion is SO32- and is more basic that sulfate.
Sulfites (or sulphites) describe a group of compounds containing the SO 3 2- ion. Sulfites are added to foods for the following reasons: 1  As a preventives. 2  To inhibit oxidation (âbrowningâ) of light-colored fruits and vegetables, such as dried apples and dehydrated potatoes.