Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/22239
Title: Metal Complexes and their Role in Wine Chemistry
Contributor(s): MacDonald, Leah  (author); Lye, Peter  (supervisor)orcid 
Corporate Author: Charles Sturt University: Australia
Publication Date: 2017-12-15
DOI: 10.25952/aan2-px44
Handle Link: https://hdl.handle.net/1959.11/22239
Related Research Outputs: https://hdl.handle.net/1959.11/57461
Abstract/Context: To further understand the speciation of transition metals in wine, the stability constants of Cu(II), Fe(II) and Zn(II) complex species formed with a range of organic acids found in wine were investigated in both aqueous and 12.5% ethanol solution (25°C, I = 0.1 M KCl). When higher concentrations of metal complexes are formed at the wine pH of 3.25, which consequently results in a lower free metal ion concentration, decreased production of xanthylium ion pigments and decreased rates of caffeic acid oxidation are observed. In contrast, higher concentrations of metal complexes generally resulted in increased ascorbic acid oxidation. When higher concentrations of metal complexes are formed at the wine pH of 3.25, which consequently results in a lower free metal ion concentration, decreased production of xanthylium ion pigments and decreased rates of caffeic acid oxidation are observed. In contrast, higher concentrations of metal complexes generally resulted in increased ascorbic acid oxidation.
Publication Type: Dataset
Fields of Research (FOR): 030207 Transition Metal Chemistry
Fields of Research (FoR) 2020: 340211 Transition metal chemistry
Socio-Economic Objective (SEO): 970103 Expanding Knowledge in the Chemical Sciences
Socio-Economic Objective (SEO) 2020: 280105 Expanding knowledge in the chemical sciences
Keywords: Wine chemistry
Transition metals
Metal complexes
Chemistry
Location: Armidale, AU (Australia/Sydney)
Format: Excel sheets in .XLSX. Results in .HQD and .TXT.
Access rights: Mediated
Open Access Embargo: 2017-12-15
HERDC Category Description: X Dataset
Dataset Managed By: School of Science & Technology
Rights Holder: University of New England
Rights Statement: Contact Chief Investigator to request access. Reuse requires attribution.
Dataset Stored at: Univeristy of New England
Primary Contact Details: Leah Macdonald - lmacdona@myune.edu.au
Dataset Custodian Details: Leah Macdonald - lmacdona@myune.edu.au
Appears in Collections:Dataset
School of Science and Technology

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