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. 2016 May 10;16(5):668. doi: 10.3390/s16050668

Figure 14.

Figure 14

PCA results for the dataset obtained by sensing mixed taste solutions with the designed IDC electronic tongue: (a) mixture of four different taste solutions (HCl, NaCl, glucose, and quinine-HCl) and (b) different percentages of mixed glucose and quinine-HCl solutions.