Electronic Tongue Can Identify Different Brands Of Beer

From ECN:

Spanish researchers have managed to distinguish between different varieties of beer using an electronic tongue. The discovery, published in the journal 'Food Chemistry', is accurate in almost 82% of cases.

In this case, the array of sensors was formed of 21 ion-selective electrodes, including some with response to cations (ammonium, sodium), others with response to anions (nitrate, chloride, etc.), as well as electrodes with generic (unspecified) response to the varieties considered.

The authors recorded the multidimensional response generated by the array of sensors and how this was influenced by the type of beer considered. An initial analysis enabled them to change coordinates to view the grouping better, although it was not effective for classifying the beers.
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