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Application of plastic polymers in remediating wine with elevated alkyl-methoxypyrazine levels.

Abstract

3-Alkyl-2-methoxypyrazines (MPs) are odour-active compounds that elicit atypical green aromas and flavours in some wines, and are resilient to removal using traditional wine-making approaches. They originate either as contaminants from Coccinellidae beetles inadvertently introduced during wine processing ("ladybug taint") or as grape-derived constituents that are undesirable at elevated levels. In this study we investigated the capacity of a selection of plastic polymers to reduce concentrations of three MPs: isopropyl methoxypyrazine (IPMP), secbutyl methoxypyrazine (SBMP) and isobutyl methoxypyrazine (IBMP). In Trial 1, red wine was spiked with IPMP (20 ng/l), SBMP (20 ng/l) and IBMP (20 ng/l), then separately treated with 13 plastic polymers (surface area 350 cm(2)/l). Three polymers were then identified for further testing based on the results from Trial 1: silicone, ethylene and vinyl acetate (EVA) and a poly-lactic acid-based biodegradable polymer. In Trial 2, the efficacy of these selected polymers to reduce MP levels in red wine was tested as a function of contact time. Solid-phase micro-extraction multi-dimensional GC-MS was used to measure MP levels before and after treatment with the polymers. Results showed significant reductions in all target odorants after 24 h treatment: silicone reduced IPMP and IBMP by 96% and 100%, respectively, while the biodegradable polymer decreased IPMP and IBMP concentrations by 52% and 36%, respectively. EVA was less effective in lowering MP levels (7% IPMP and 23% IBMP after 24 h). Taken overall, the data suggest the potential for the use of poly-lactic acid and silicone in treating wines contaminated by ladybug taint, as well as in reducing high levels of grape-derived MPs.

Authors+Show Affiliations

a Cool Climate Oenology and Viticulture Institute , Brock University , St. Catharines , Canada.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25895134

Citation

Botezatu, Andreea, and Gary J. Pickering. "Application of Plastic Polymers in Remediating Wine With Elevated Alkyl-methoxypyrazine Levels." Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment, vol. 32, no. 7, 2015, pp. 1199-206.
Botezatu A, Pickering GJ. Application of plastic polymers in remediating wine with elevated alkyl-methoxypyrazine levels. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2015;32(7):1199-206.
Botezatu, A., & Pickering, G. J. (2015). Application of plastic polymers in remediating wine with elevated alkyl-methoxypyrazine levels. Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment, 32(7), 1199-206. https://doi.org/10.1080/19440049.2015.1028106
Botezatu A, Pickering GJ. Application of Plastic Polymers in Remediating Wine With Elevated Alkyl-methoxypyrazine Levels. Food Addit Contam Part A Chem Anal Control Expo Risk Assess. 2015;32(7):1199-206. PubMed PMID: 25895134.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Application of plastic polymers in remediating wine with elevated alkyl-methoxypyrazine levels. AU - Botezatu,Andreea, AU - Pickering,Gary J, Y1 - 2015/04/20/ PY - 2015/4/21/entrez PY - 2015/4/22/pubmed PY - 2016/3/10/medline KW - ladybug taint KW - methoxypyrazines KW - plastic polymers KW - remediation KW - silicone KW - wine SP - 1199 EP - 206 JF - Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment JO - Food Addit Contam Part A Chem Anal Control Expo Risk Assess VL - 32 IS - 7 N2 - 3-Alkyl-2-methoxypyrazines (MPs) are odour-active compounds that elicit atypical green aromas and flavours in some wines, and are resilient to removal using traditional wine-making approaches. They originate either as contaminants from Coccinellidae beetles inadvertently introduced during wine processing ("ladybug taint") or as grape-derived constituents that are undesirable at elevated levels. In this study we investigated the capacity of a selection of plastic polymers to reduce concentrations of three MPs: isopropyl methoxypyrazine (IPMP), secbutyl methoxypyrazine (SBMP) and isobutyl methoxypyrazine (IBMP). In Trial 1, red wine was spiked with IPMP (20 ng/l), SBMP (20 ng/l) and IBMP (20 ng/l), then separately treated with 13 plastic polymers (surface area 350 cm(2)/l). Three polymers were then identified for further testing based on the results from Trial 1: silicone, ethylene and vinyl acetate (EVA) and a poly-lactic acid-based biodegradable polymer. In Trial 2, the efficacy of these selected polymers to reduce MP levels in red wine was tested as a function of contact time. Solid-phase micro-extraction multi-dimensional GC-MS was used to measure MP levels before and after treatment with the polymers. Results showed significant reductions in all target odorants after 24 h treatment: silicone reduced IPMP and IBMP by 96% and 100%, respectively, while the biodegradable polymer decreased IPMP and IBMP concentrations by 52% and 36%, respectively. EVA was less effective in lowering MP levels (7% IPMP and 23% IBMP after 24 h). Taken overall, the data suggest the potential for the use of poly-lactic acid and silicone in treating wines contaminated by ladybug taint, as well as in reducing high levels of grape-derived MPs. SN - 1944-0057 UR - https://www.unboundmedicine.com/medline/citation/25895134/Application_of_plastic_polymers_in_remediating_wine_with_elevated_alkyl_methoxypyrazine_levels_ DB - PRIME DP - Unbound Medicine ER -
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