
Volatile phenols have been implicated as contributors to off-odors associated with taints from bushfire smoke and microbial spoilage. Various methods for the amelioration of off-odors have been evaluated, but to date, they have not included cyclodextrin (CD) polymers. In the current study, two CD polymers were prepared from β- and γ-CD, using hexamethylene diisocyanate (HDI) as a crosslinking agent. Adsorption tests were performed with four volatile phenols (guaiacol, 4-methylguaiacol, 4-ethylguaiacol and 4-ethylphenol) at concentrations up to 1 mg/L. The removal of volatile phenols by CD polymers achieved equilibrium almost instantly, with isotherm tests suggesting an adsorption capacity of 20.7 µg of volatile phenol per gram of polymer. Langmuir and Freundlich models were subsequently used to fit the data. In batch adsorption tests, the CD polymers achieved 45 to 77% removal of volatile phenols. Polymer reusability was also evaluated and was found to be excellent. A comparison between volatile phenol adsorption by CDs vs. CD polymers, determined using a novel four-phase headspace solid-phase microextraction (HS-SPME) method for gas chromatography-mass spectrometry (GC-MS), suggests CD polymers offer several advantages for use by the wine industry.
Cyclodextrins, Polymers, <i>brettanomyces</i>, Proton Magnetic Resonance Spectroscopy, Temperature, Brettanomyces, Organic chemistry, Wine, smoke taint, 540, gas chromatography-mass spectrometry, Article, nuclear magnetic resonance, QD241-441, Cross-Linking Reagents, cyclodextrin, Phenols, <i>Brettanomyces</i>, Adsorption, wine, Volatilization
Cyclodextrins, Polymers, <i>brettanomyces</i>, Proton Magnetic Resonance Spectroscopy, Temperature, Brettanomyces, Organic chemistry, Wine, smoke taint, 540, gas chromatography-mass spectrometry, Article, nuclear magnetic resonance, QD241-441, Cross-Linking Reagents, cyclodextrin, Phenols, <i>Brettanomyces</i>, Adsorption, wine, Volatilization
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 26 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
