Complex Formation in a Liquid-Liquid Extraction System Containing Cobalt(II), 4-(2-Pyridylazo)resorcinol, and Nitron

Figure 5

Determination of the PAR-to-Co (1) and Nt-to-Co (2) molar ratios by the mobile equilibrium method. (1)𝐶_Co=1.7×10⁻⁵molL⁻¹, 𝐶_Nt=3.5×10⁻⁴molL⁻¹, pH=5.3, 𝜆=520nm, and 𝑙=1cm. (2)𝐶_Co=1.7×10⁻⁵molL⁻¹, 𝐶_PAR=1.0×10⁻⁴molL⁻¹, pH=5.3, 𝜆=520nm, and 𝑙=1cm.