Fig. 2From: Low-cost, disposable colourimetric sensors for metal ions detectionKinetic profiles of PAN on CC. CC pieces of 2 × 2.5 cm (0.03 g) put in contact with 10 mL of 50 μM PAN solutions at pH = 11 for different contact times. The black line is the fitting according to a film diffusion limiting process modelBack to article page