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 sulfur dioxide is a fruit preservative widely used in dried fruits as well as wine. It is also produced by the human body at the level of about 1000 mg (milligrams) per day. Yeast naturally produce sulfites during fermentation so there is only a rare wine which contains none. 2  The US requires a sulfite warning label and Australia requires a label indicating preservative 220, but nearly all winemakers add sulfites, including those in France, Italy, Spain, Australia, Chile, etc etc.