Fig. 7
From: Low-cost, disposable colourimetric sensors for metal ions detection
Software output for the PLS regression model: Co(II), Ni(II), and Zn(II) on the PAN-CC sensor. a Model for Co(II); b model for Ni(II); c model for Zn(II). The different colours refer to five replicates at different metal ion concentration. (1) Comparison of the experimental points with the points recalculated from the model; (2) the same comparison but in the conditions of cross-validation. This plot assesses the variability of the estimated parameters and its effect on the prediction