I recently bought some SO3 test strips from Amazon. 100 strips for 33$
I have only used them on my urine. If I am having a reaction, I dip the test strip in my
morning urine (most concentrated) and it has detected sulfites. As for using it on veggies,
you would have to soak the veggies maybe. Not sure how you could use the strips for veggies.
Post Edited (Cherylt58) : 1/3/2014 8:14:12 PM (GMT-7)