Fig. 4From: Solid-Phase Spectrophotometric Analysis of 1-Naphthol Using Silica Functionalized with m-Diazophenylarsonic AcidDependencies of Kubelka-Munk function (at λ max) from the contact time of SiO2 –DS with: (1) 1-naphthol, (2) 2-naphthol, and (3) resorcinol. The intermediate values in 2–10 min range are indicated by dotted lines. m (SiO2 –DS) = 50 mg, C 0 = 2 × 10−5 mol L−1, V = 25 mL, pH = 8Back to article page