Figure 10From: Reaction of 2,6-dichloroquinone-4-chloroimide (Gibbs reagent) with permethrin – an optical sensor for rapid detection of permethrin in treated woodReproducibility study of permethrin optical sensor. Permethrin concentrations: 10, 100, and 200 μM; concentration of Gibbs reagent: 1 M; pH: 11.0.Back to article page