e-journal
Evaluation of organic and inorganic compounds levels of red wines processed from Pinot Noir grapes
Pinot Noir red wines made by malolactic fermentation were studied for studying differences in their
chemical profiles with help of a wide spectrum of grape-based and other chemical compounds used in
winemaking. Determinations were made with capillary electrophoresis, liquid chromatography, and
spectrometry to investigate carbohydrates, organic acids, aldehydes, anthocyanins, phenolic compounds,
inorganic anions, and metals. In addition, tot-N, tot-S, and tot-P in the wines were examined.
The wine products showed different profiles of carbohydrates, organic acids, phenolic compounds, and
minerals. Especially, saccharose (max. 0.21 g/L), rhamnose (max. 0.45 g/L), fructose (max. 1.9 g/L), and
phosphate (max 1.4 g/L) quantities were extremely high in some wines. The results also showed that
yeast fermentation in winemaking agitated high production of lactic (max 5.7 g/L) and tartaric (max
1.7 g/L) acids. The red wines processed by cold maceration and natural fermentation gave similar profiles.
Only one of the Pinot Noir wines entirely differentiated from the others with comparison of carbohydrates
and organic acids.
Keywords:
Pinot Noir grapes
Profiling
Fermentation
Separation
Organic compounds
Metals
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