The team of scientists involved in the study were led by Professor Rahul Nair at the National Graphene Institute and School of Chemical Engineering and Analytical Science at The University of Manchester.
An ultra-thin membrane using graphene-oxide sheets were assembled in such a way that they were able to completely remove various organic dyes, dissolved in methanol, which were as small as a nanometre.
The membrane permitted the alcohol to pass through but trapped the larger molecules that gives the whisky its colour.
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Source: Drinks Business