Use these test strips to detect sulfite levels from 10 to 500ppm - confirms absence of sulfite in wine, lemon juice, potatoes, shellfish or dried fruit.
Note: Food Warnings that say "May contain sulfite" are referring to trace levels & will likely not register with these strips. If you reduce liquids such as wine or lemon juice by boiling (water evaporation) it may be possible to detect sulfites.
For people with an allergy to sulfite, 100ppm is generally considered to be the minimum to trigger a reaction. Use these strips if you aren't sure about the food source.
Click on the Details tab below or read more in our blog on what 10ppm really means.