Fig. 2: E-nose and E-tongue analyses of tilapia skin and soup in the boiling process.

A, B E-nose PCA plot and radar graph of tilapia skin. C, D: E-nose PCA plot and radar graph of tilapia skin soup. E, F E-tongue PCA plot and radar graph of tilapia skin. G, H E-tongue PCA plot and radar graph of tilapia skin soup.