New app can tell if your beer is fresh!

The system developed by researchers consists of sensor discs that detect the presence of furfural in beer.

 Beer is one of the most widely consumed alcoholic beverages in the world. (Photo: Pixabay)

London: Beer lovers, rejoice! Researchers have developed a simple, low-cost method to measure if your beverage has gone stale by using a sensor and a smartphone app.

Scientists from the Complutense University of Madrid (CUM) developed a method that allows brewers to measure the freshness of beer using a polymer sensor that changes colour upon detecting furfural, a compound that gives aged beer a stale flavour. The sensor can be controlled via a smartphone app also
created by them.

Beer is one of the most widely consumed alcoholic beverages in the world. The flavour of each brand is one of its most relevant quality standards. However, depending on the beer type and its storage conditions, flavour may be altered as a result of changes in the chemical composition produced during beer with a negative effect on the quality of the flavour, researchers said. The new method is simple and low-cost and is capable of measuring whether or not beer has gone stale, simply by using a sensor and a smartphone app, they said.

Until now, brewers have measured furfural and other freshness indicators using methods based on chromatography techniques, researchers said. "But these methods involve the use of expensive equipment and sample preparation is very time-consuming," said Elena Benito-Pena from CUM. The system developed by researchers consists of sensor discs that detect the presence of furfural in beer.

These sensors, made from a polymer similar to the one used to manufacture contact lenses, have been designed to change colour (from yellow to pink) when they come into contact with a beer containing furfural. "We have incorporated an aniline derivative into the sensor material which reacts with the furfural and produces a pink cyanine derivative that allows us to identify the presence of the marker in the sample," researchers said.

"The intensity of the colour increases as the concentration of furfural in the beer rises and, thus, as more time passes since the beer was produced," they said.
Researchers have also created a mobile app for Android smartphones that, by analysing a photo of the sensor disc, identifies the amount of furfural present in the beer. With this data, the degree of freshness can be determined. The study was published in the journal Analytical Chemistry.

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Self-service beer taps coming your way

 
How much do you hate waiting for another beer in a crowded bar?


It irked Josh Goodman enough to invent a pretty obvious solution -- self-service beer taps.

Goodman, 36, recalled the exact moment in late 2008 when his frustration boiled over.

"I was hanging out with my friends at a Baltimore sports bar before an Orioles game," he said. "We just couldn't get another beer served to us quickly."

Even more than being annoyed, Goodman was struck by how much money the bar must be losing. Almost immediately, he got to work on a self-service beer concept.

Within a few months, Goodman had launched PourMyBeer in Chicago (where he'd relocated to be with his wife).

He invested $20,000 of his own funds and partnered with a U.S. manufacturer to make beer tables with two to four self-service taps.

In February 2009, Goodman landed his first client: A Baltimore tavern. He spent the next two years growing the business and adding more bars and restaurants.

In 2011, PourMyBeer introduced self-service "beer walls," which let people pour their own beer from taps on a wall.

PourMyBeer has expanded to over 200 restaurants and bars in 28 states and Canada. The concept will roll out in Chicago's O'Hare International Airport this week and in Italy and Brazil later this year.

The tables start at $4,000 and the beer walls cost as much as $16,000. It generated more than $400,000 in sales in 2013 and doubled that in 2014. Goodman expects to take in close to $2 million in revenue this year -- which would make it the company's first profitable year.

"Our business customers tell us that they've cut down on waste and they're selling twice as much beer on average," said Goodman.

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