Figure 3From: Immobilization of tris(2 pyridyl) methylamine in a PVC-Membrane Sensor and Characterization of the Membrane Properties(a) UV–vis absorption spectra of acetonitrile solutions of 1.0 × 10-4 M TiCl 3 ; (b) 1.0 × 10-4 M tpm in the absence of TiCl 3 ; (c) tpm 1.0 × 10-4 M treated with 1.0 × 10-4 M TiCl 3 solution.Back to article page