Lysol disinfecting wipes are infused with 0.26% benzalkonium chloride [aka Alkyl (C14, C12, C16) Dimethyl Benzyl Ammonium Chloride]. This is very close to 2500ppm so the best quat strip to confirm they are fresh is our 0-10000ppm quaternary ammonium test strips. Simply pressing the test strip pad against a moist disinfecting wipe for a few seconds should be enough.