Navigation Links
Dark beer has more iron than pale beer
Date:8/11/2011

A team of researchers from the University of Valladolid (Spain) has analysed 40 brands of beer, discovering that dark beer has more free iron than pale and non-alcoholic beers. Iron is essential to the human diet, but also helps oxidise the organic compounds that give these beverages stability and flavour.

According to the analysis carried out by the University of Valladolid (UVa) on 40 types of beers from all 5 continents, dark beers have an average free iron content of 121 ppb (parts per billion) compared to 92 ppb in pale beers and 63 ppb in non-alcoholic beers.

"Although these quantities are very small, the differences are apparent and could be due to the production processes or raw materials used in manufacturing," stated Carlos Blanco, professor of Food Technology at UVa and co-author of the study.

The study, published in the Journal of the Science of Food and Agriculture, indicates that higher iron content in dark beer could be explained by the malt and hop extracts used to produce it.

However, pale beer production includes a filtering stage in which diatomaceous earth is used. This sedimentary rock is a porous material with micro-algae used to lighten the beer; it traps the iron, causing its concentrations to decrease.

Non-alcoholic beer undergoes vacuum evaporation processes to remove the alcohol. This operation also removes iron ions given that they are dragged by the volatile molecules.

The study examined 17 Spanish beer brands and 23 from other countries, with 28 pale, 6 dark and 6 non-alcoholic beers. The beers with the highest iron content were a dark Spanish beer (165 ppb) and a dark Mexican beer (130 ppb). Those that had the lowest levels of iron were from The Netherlands and Ireland (41 ppb and 47 ppb, respectively).

Measuring the levels of iron and other metals in beer is not only important because they are essential to the human diet, but also because of their relevance in the brewing process. Levels of metals in beer can determine its organoleptic characteristics, stability and quality.

Researchers have validated the technique they developed to analyse iron (differential pulse adsorptive stripping voltammetry technique), which is "an ultra-sensitive, selective, rapid, reliable and cost-effective method". The team has also recently applied an 'electronic tongue' for the first time to quantify the degree of bitterness and alcohol in beer.


'/>"/>

Contact: SINC
info@agenciasinc.es
34-914-251-820
FECYT - Spanish Foundation for Science and Technology
Source:Eurekalert  

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Dark beer has more iron than pale beer
(Date:2/1/2016)... , Feb. 1, 2016  Today, the first ... (AHA) announced plans to develop a first of its ... power of IBM Watson. In the first application of ... IBM (NYSE: IBM ), and Welltok will create ... health assessments with cognitive analytics, delivered on Welltok,s health ...
(Date:1/25/2016)... 25, 2016  Glencoe Software, the world-leading supplier of ... industries, will provide the data management solution OMERO Plus ... Photo - ... Phenotypic analysis measures the characteristics and ... comparisons between states such as health and disease, the ...
(Date:1/20/2016)... 20, 2016   MedNet Solutions , an innovative ... of clinical research, is pleased to announce the attainment ... are the result of the company,s laser focus on ... , it,s comprehensive, easy-to-use and highly affordable cloud-based ... Key MedNet growth achievements in 2015 include: ...
Breaking Biology News(10 mins):
(Date:2/11/2016)...   BioInformant announces the February 2016 release ... Opportunities, Tools, and Technologies – Market Size, Segments, Trends, ... The first and only market ... BioInformant has more than a decade of historical information ... stem cell type. This powerful 175 page global strategic ...
(Date:2/11/2016)... ... February 11, 2016 , ... ... cell treatment clinic in Quito, Ecuador. The new facility will provide advanced protocols ... patients from around the world. , The new GSCG clinic is headed ...
(Date:2/10/2016)... Feb. 10, 2016  The Maryland House of Delegates ... announced that University of Maryland School of Medicine Dean ... University of Maryland Medical System President and CEO ... Medallion," the highest honor given to the public by ... Dean Reece and Mr. Chrencik for their ...
(Date:2/10/2016)... New York, and New York, New York (PRWEB) , ... ... ... Regeneron Pharmaceuticals Inc. (NASDAQ: REGN) today announced that it ... and develop new vaccines and immunotherapies for infectious diseases and cancer. ...
Breaking Biology Technology: