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Cheers! Electronic tongue can identify beer brands

Posted on Jan 31 2014 | IANS

Madrid, Jan 31 : A die hard fan of beer but not able to distinguish between different varieties of the bubbly? Here comes an electronic tongue that can do it for you.

Spanish researchers have been successful in recognising different varieties of beer using an electronic tongue.

The discovery is accurate in nearly 82 percent of cases and can one day give robots a sense of taste!

The electronic tongue - based on the human sense of taste - uses a generic array of sensors.

"The method did enable us to distinguish between the main categories of beer we studied - Schwarzbier, lager, double malt, Pilsen, Alsatian and low-alcohol with a success rate of 81.9 percent," said Manel del Valle from Autonomous University of Barcelona.

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

The researchers recorded the response generated by the array of sensors and how this was influenced by the type of beer considered.

"In other words, with generic response to the various chemical compounds involved - which generate information with advanced tools for processing, pattern recognition and even artificial neural networks - we were able to identify various brands of beer," added del Valle.

This tool could one day give robots a sense of taste, and even supplant panels of tasters in the food industry to improve the quality and reliability of products for consumption.

There are, however, varieties of beers that the tongue is not trained to recognise such as beer/soft drink mixes or foreign makes.

It means the method does not recognise brands for which it was not trained, said the study published in the journal Food Chemistry.

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