Sulfite/Preservative Allergy - Anyone??

[Jimsing225]

My neice has mild allergies to sulfite. I looked up more info on the net and found this:

The Australasian Society of Clinical Immunology and Allergy - SULFITE ALLERGY

At the bottom it says there are sulfite test strips to test foods with.

Does anyone know if they are the ones they are talking about?? and do you think they are worth the trouble?

My neighbour works in a chip manufacturing place and he told me they use test strips to check the levels of sulfite in the chemicals that stop potatos going brown after they are peeled.