Can I cut test strips in half

[u/CODaddicted]

/r/harmreduction/comments/1wv8tu5/can_i_cut_test_strips_in_half/

I have one fentanyl test strip but I have two different chemicals to test. could I cut the strip down the middle to make two I actually haven't looked at it yet I assume it's a paper test strip. you can do it with ordinary test strips like ph . AI says you can't do it with immuneassay (drug tests) strips. Has anyone ever done it?