CHEMICAL ANALYSIS OF SOME COMMERCIAL WINES
CHEMICAL ANALYSIS OF SOME COMMERCIAL WINES
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Date
1984-06
Authors
ABOHO, SYLVESTER YAHEMBE
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Abstract
Samples of five commercial wines were analysed
for alcohol content (percent by volume), total
sulphur dioxide, ash content and total acidity.
Other parameters determined were ash alkalinity,
tannins, pH and metal ions - potassium, sodium,
magnesium, copper, iron, manganese, zinc, cadmium
and lead.
Results of percent alcohol content, by volume
gave higher values than their equivalents inscribed
on the bottles in degrees proof.
Total sulphur dioxide for the various samples
ranged from 129.61 + 0.49 to 260.99 ± 0.04 mg/l;
and only White Lady (Samples E1 and E2) had total
sulphur dioxide within the range stipulated by the
United States Standards for Wines. Dubonnet
(Samples D1 and D2) showed the lowest total sulphur
dioxide content.
The amounts of tannins detected in all the wine
samples were lower than previously published results.
However, values were as expected higher for red or
colored wines than for white ones.
Cadmium was detected only in the tonic wines -
Dubonnet and Ambassadeur, Apart from Sample E1
(White Lady) lead content was found to be far in
excess of the stipulated safe content.
Description
A THESIS SUBMITTED TO THE POSTGRADUATE SCHOOL,
AHMADU BELLO UNIVERSITY, IN PARTIAL FULFILLMENT
OF THE REQUIREMENTS FOR THE DEGREE OF MASTER
OF SCIENCE (ANALYTICAL CHEMISTRY).
DEPARTMENT OF CHEMISTRY,
FACULTY OF SCIENCE,
AHMADU BELLO UNIVERSITY,
ZARIA - NIGERIA.
Keywords
CHEMICAL,, ANALYSIS,, COMMERCIAL,, WINES,