Simple approach for cleaning up 2,4,6‐trichloroanisole from alcoholic‐beverage‐reconstituted solutions using polymeric materials

Abstract

Background and Aims 2,4,6‐Trichloroanisole (TCA) is a well‐recognised contaminant in the wine and whisky industries. In this work, several polymeric materials were tested through a hybrid strategy (computational and experimental studies) as potential fining agents for elimination of TCA. Methods and Results Sodium alginate, polyaniline emeraldine base (PANI‐EB), polyaniline emeraldine salt (PANI‐ES) and three cross‐linked derivatives of different generations (G3, G4 and G5) of polyamidoamine (PAMAM) were tested. Materials were characterised by Fourier transform infrared spectroscopy and thermogravimetric analysis. The amount of material and the interaction time needed to achieve TCA sorption were optimised in a screening study. The binding capacity of the materials was then determined in methanol‐reconstituted wine and whisky solutions to demonstrate their effectiveness. The proportion of TCA in wine retained by PANI‐ES, PANI‐EB and PAMAM‐G5‐CD was greater than 75%, and for whisky all polymers except PANI‐ES retained greater than 75% of TCA. The concentration of phenolic substances of both methanol‐reconstituted solutions was measured after treatment; most of the polymers had no impact on the concentration of phenolic substances. The intermolecular interactions between the polymeric materials and TCA were characterised by computational studies involving molecular dynamics simulations. Conclusions The polymers PAMAM G5‐CD and PANI‐EB retained the most TCA in reconstituted red wine and whisky solutions. Significance of the Study The provision of efficient materials for the removal of TCA will improve the purification processes employed in beverage production.

Design and Optimization of a Self-Assembling Complex Based on Microencapsulated Calcium Alginate and Glutathione (CAG) Using Response Surface Methodology

“…The structure of the monomeric alginate and the protocol for computational block-building were obtained from Valdes et al, 2008 [ 31 ]. Forty alginate chains with the monomers, namely M and G ((1⟶4) linked β-D-mannopyranuronic acid and α-L-gulopyranuronic acid, respectively), were used to build GG and MM blocks that generated ten-block-long alginate chains using the LEAP module of AmberTools software [ 32 ].…”

Musty and Moldy Taint in Wines: A Review

“…Recently, it has been shown that some polymers (polyanilines) were able to eliminate 75% of TCA and 13% TBA in whisky without significative consequences on the aromatic profile and on the total phenolic content [66]. The same team also verified the possibility to use these inexpensive polymeric materials as potential fining agents for elimination of TCA in the beverage industry, through a hybrid strategy of computational and experimental studies [67]. These polymers seem to have some advantages for future practical applications.…”

State-of-the-Art Knowledge about 2,4,6-Trichloroanisole (TCA) and Strategies to AvoidCork Taintin Wine

“…Subsequent works on the development of suitable polymeric materials for the removal of TCA from wine involved the usage of polyaniline-based materials and cross-linked derivatives of polyamidoamine [104]. They demonstrated a relatively high TCA absorption (>75%) and almost no impact on phenolic compounds in wine.…”