Solid State Characterization of Croatian Wine Grape Pomace by NMR and ATR-FTIR

Parlov Vuković, Jelena; Jednačak, Tomislav; Divjak, Leda; Smetko, Katarina; Tišma, Marina; Klarić, Ana-Marija; Jagatić Korenika, Ana-Marija; Bucić-Kojić, Ana; Novak, Predrag (2025) Solid State Characterization of Croatian Wine Grape Pomace by NMR and ATR-FTIR. Croatica Chemica Acta, 98 (2). ISSN 0011-1643

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Abstract

Grape pomace (GP), the solid residues remained after production of the continental and coastal Croatian red wines, has been studied by solid-state NMR and ATR-FTIR methods. After collection, drying and milling, GP samples have been analysed by IR spectroscopy and characteristic vibrational bands have been assigned. The observed differences in some functional group vibrations have been detected for continental and coastal GPs as well as for different vintages. ¹³C cross-polarization magic angle spinning (CP MAS) NMR experiments provided further information on chemical composition of GPs and percentages of different compounds present in the samples such as polysaccharides and phenolic compounds. ³¹P MAS spectra gave valuable quantitative information on the phosphorus content. The GPs from the continental varieties contain much larger portion of phosphorus compared to coastal ones, which is important for their potential use as an attractive raw material and value-added compounds for industrial applications.

Item Type:	Article
Uncontrolled Keywords:	grape pomace; solid-state characterization; ssNMR; ATR-IR
Subjects:	NATURAL SCIENCES > Chemistry > Analytic Chemistry
Divisions:	NMR Center
Projects:	Project title Project leader Project code Project type Valorisation of residues from the vegetable oil industry based on a biorefinery approach Marina Tišma IPS-2023-02-6614 Hrvatska zaklada za znanost Centar izvrsnosti u kemiji - CIuK-CIuK Josip Požar; Mirta Rubčić; Ivana Biljan KK.01.1.1.02.0016 EK
Depositing User:	Josipa Karadžole
Date Deposited:	23 Jul 2025 07:12
URI:	http://fulir.irb.hr/id/eprint/9905
DOI:	10.5562/cca4176

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