Figure 6From: Reaction of 2,6-dichloroquinone-4-chloroimide (Gibbs reagent) with permethrin – an optical sensor for rapid detection of permethrin in treated woodEffects of concentration of Gibbs reagent on chemical sensor response. Permethrin concentrations: 25.0, 50.0, and 100.0 μM; pH: 11.0.Back to article page