Electronic Tongue Based on Nanostructured Hybrid Films of Gold Nanoparticles and Phthalocyanines for Milk Analysis

Figure 6

PCA plots for milk samples obtained from electrical capacitance values recorded at 1 kHz and 50 mV for two different e-tongues comprising 3 sensing units each, as follows: (a) e-tongue 1: bare electrode and 7-bilayer PAH/CuTsPc and 7-bilayer PAH/NiTsPc LbL films and (b) e-tongue 2: bare electrode and 7-bilayer Au@PAH/CuTsPc and 7-bilayer Au@PAH/NiTsPc LbL films. The data variance for PC1 and PC2 is included in the figure.

(a)

(b)