Featured Research

from universities, journals, and other organizations

Widely used filtering material adds arsenic to beers

Date:
April 7, 2013
Source:
American Chemical Society (ACS)
Summary:
The mystery of how arsenic levels in beer sold in Germany could be higher than in the water or other ingredients used to brew the beer has been solved, scientists say.

Some German beers have elevated arsenic levels resulting from the material used to filter and clarify the beer.
Credit: Mehmet Coelhan, Ph.D

The mystery of how arsenic levels in beer sold in Germany could be higher than in the water or other ingredients used to brew the beer has been solved, scientists announced in New Orleans April 7 at the 245th National Meeting & Exposition of the American Chemical Society.

Related Articles


Mehmet Coelhan, Ph.D., and colleagues said the discovery could be of importance for breweries and other food processors elsewhere that use the same filtering technology implicated in the elevated arsenic levels in some German beers. Coelhan's team at the Technische Universitδt in Munich set out to solve that riddle after testing 140 samples of beers sold in Germany as part of a monitoring program. The monitoring checked levels of heavy metals like arsenic and lead, as well as natural toxins that can contaminate grain used in brewing beer, pesticides and other undesirable substances.

Coelhan explained that the World Health Organization uses 10 micrograms per liter of arsenic in drinking water as a limit. However, some beers contained higher arsenic levels. "When arsenic level in beer is higher than in the water used during brewing, this excess arsenic must come from other sources," Coelhan noted. "That was a mystery to us. As a consequence, we analyzed all materials, including the malt and the hops used during brewing for the presence of arsenic."

They concluded that the arsenic was released into the beer from a filtering material called kieselguhr, or diatomaceous earth, used to remove yeast, hops and other particles and give the beer a crystal clear appearance. Diatomaceous earth consists of fossilized remains of diatoms, a type of hard-shelled algae that lived millions of years ago. It finds wide use in filtering beer, wine and is an ingredient in other products.

"We concluded that kieselguhr may be a significant source of arsenic contamination in beer," Coelhan said. "This conclusion was supported by analysis of kieselguhr samples. These tests revealed that some kieselguhr samples release arsenic. The resulting arsenic levels were only slightly elevated, and it is not likely that people would get sick from drinking beers made with this filtration method because of the arsenic. The arsenic is still at low levels -- the risk of alcohol poisoning is a far more realistic concern, as stated in previous studies on the topic."

Coelhan pointed out that beers produced in at least six other countries had higher arsenic amounts than German beers, according to a report published four years ago. He said that breweries, wineries and other food processors that use kieselguhr should be aware that the substance can release arsenic. Substitutes for kieselguhr are available, he noted, and simple measures like washing kieselguhr with water can remove the arsenic before use.


Story Source:

The above story is based on materials provided by American Chemical Society (ACS). Note: Materials may be edited for content and length.


Cite This Page:

American Chemical Society (ACS). "Widely used filtering material adds arsenic to beers." ScienceDaily. ScienceDaily, 7 April 2013. <www.sciencedaily.com/releases/2013/04/130407183550.htm>.
American Chemical Society (ACS). (2013, April 7). Widely used filtering material adds arsenic to beers. ScienceDaily. Retrieved January 27, 2015 from www.sciencedaily.com/releases/2013/04/130407183550.htm
American Chemical Society (ACS). "Widely used filtering material adds arsenic to beers." ScienceDaily. www.sciencedaily.com/releases/2013/04/130407183550.htm (accessed January 27, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Tuesday, January 27, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

How To: Mixed Green Salad Topped With Camembert Cheese

How To: Mixed Green Salad Topped With Camembert Cheese

Rumble (Jan. 26, 2015) — Learn how to make a mixed green salad topped with a pan-seared camembert cheese in only a minute! Music: Courtesy of Audio Network. Video provided by Rumble
Powered by NewsLook.com
Water Fleas Prepare for Space Voyage

Water Fleas Prepare for Space Voyage

Reuters - Innovations Video Online (Jan. 26, 2015) — Scientists are preparing a group of water fleas for a unique voyage into space. The aquatic crustaceans, known as Daphnia, can be used as a miniature model for biomedical research, and their reproductive and swimming behaviour will be tested for signs of stress while on board the International Space Station. Jim Drury went to meet the team. Video provided by Reuters
Powered by NewsLook.com
Husky Puppy Plays With Ferret

Husky Puppy Plays With Ferret

Rumble (Jan. 26, 2015) — It looks like this 2-month-old Husky puppy and the family ferret are going to be the best of friends. Look at how much fun they&apos;re having together! Credit to &apos;Vira&apos;. Video provided by Rumble
Powered by NewsLook.com
Scientists Model Flying, Walking Drone After Vampire Bats

Scientists Model Flying, Walking Drone After Vampire Bats

Buzz60 (Jan. 26, 2015) — Swiss scientists build a new drone that can both fly and walk, modeling it after the movements of common vampire bats. Jen Markham (@jenmarkham) has the story. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins