How do you test for Sulfites in raisins?

To test for sulfites in raisins, you can use a simple method involving a small amount of hydrogen peroxide and a few drops of a reagent such as potassium iodide. When mixed with the raisins, if sulfites are present, a color change will occur, indicating their presence. Alternatively, commercial sulfite test strips are available that can provide a more straightforward and quantitative measurement. Always follow safety guidelines and manufacturer instructions when using chemicals or test kits.