QUALITY OF SOME BEERS BREWED IN NIGERIA
QUALITY OF SOME BEERS BREWED IN NIGERIA
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Date
2015-06-09
Authors
KOMAK, ISAAC ZUHUMNAN
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Abstract
The analysis of some Beers such as Star and Guider from
Nigerian Breweries Limited, Kaduna; Bock, Jos International
Breweries Limited, Jos; Double Crown, North Brewery Limited,
Kano; Stout, Nigerian Guiness Stout Limited, Lagos, and Noble,
Kwara Breweries Limited, Ijagbo, has been carried out to determine
the quality of various Beer samples. The exercise includes•
(l) estimation of alcohol by volume and by weight or mass,
apparent extract, real extract and specific gravity;
(ii) determination of the nutritive value of beer,
determined by estimating the total nitrogen (protein, reducing
sugars and dextrine;
(iii) determination of the chemical compositions of the beers
by estimating the ash;
(iv) determination of carbon dioxide content, colour, total
acidity, volatile acidity and fixed acidity in the beers.
These constitute the organoleptic property of beers
(v) study of stability of the beers. This involves the
estimation of apparent attenuation, real attenuation and determination
of pH and Haze or turbidity of the bottled beer.
(vi) Last study is concerned with some factors which affect
the quality of bottled beer. This requires the determination of 2.
the concentration of copper, iron, and chloride ions present
in the beer samples.
The quality of various samples of beer based on the analytical
study suggests that deterioration in shelf-life of beers
solely depends on the quantity of iron, copper or chloride ions
present. Iron and copper have catalysing effects on the
quality of beer since their presence introduces oxidationreduction
processes to occur, while the presence of chloride ion
in high concentration may lead to deterioration in the beer taste.
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QUALITY OF SOME BEERS BREWED IN NIGERIA, QUALITY OF SOME BEERS BREWED IN NIGERIA