Evaluation of organic and inorganic compounds levels of red wines processed from Pinot Noir grapes

Abstract

a b s t r a c tPinot 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.

Resveratrol, phenolic antioxidants, and saccharides in South American red wines

“…However, the data obtained in the present study for glucose (3.4 g/L) and fructose (3.1 g/L) are in accordance with previous studies reported in French wines. 12,29 General sources, such as the USDA, point to low levels of total saccharides in red wine, typically around 6 g/L (USDA food databases). However, in our material, we may note that the saccharose content is comparably high for some wines, up to about 10 g/L, possibly indicating a late dosage of saccharose to the wine.…”

Vine shoots waste – new resources for bioethanol production

“…The presence of inorganic compounds and metals in VSW depend on several factors, such as: grape types, soil characteristics, areas of production and environmental conditions (SIRÉN & al [27]). The metal content in the analyzed VSW samples varied in the following ranges (mg kg -1 (Figure 1).…”

Capillary electrophoresis as a method to determine underivatized urinary lipoarabinomannans, a biomarker of active tuberculosis caused byMycobacterium tuberculosis

“…It contained 0.3362 g of 2,6‐PDC, 0.0220 g of CaCl 2 *2H 2 O, and either 150 or 300 μL OFM‐OH. The pH of the solution was adjusted with ammonia to 9.0 . The electrolyte was used for separations under polarity from cathode to anode.…”