Hybrid Electronic Tongues Applied to the Quality Control of Wines

Table 3

Relative errors obtained in the quantification of chemical parameters using the PLS regression for a set of white wines.

Sample	VAD	Total acidity	pH	[Ca^2+]	[Mg^2+]	Glycerol
Macabeu	2.82	3.7	0.79	0.7	4.9	6.0
Parellada	0.07	9.5	3.55	5.1	0.1	2.0
Chardonnay	3.32	2.7	1.16	5.7	2.2	4.3
Xarel·lo	0.62	1.0	4.76	4.0	2.8	12.3
Mean error (%)	1.71	4.2	2.56	3.9	2.5	6.2