title: Synchronous two-dimensional MIR correlation spectroscopy (2D-COS) as a novel method for screening smoke tainted wine.
abstract: In this study, two-dimensional correlation spectroscopy (2D-COS) combined with mid-infrared (MIR) spectroscopy was evaluated as a novel technique for the identification of spectral regions associated with smoke-affected wine, for the purpose of screening taint arising from grapevine exposure to smoke. Smoke-affected wines obtained from experimental and industry sources were analysed using MIR spectroscopy and chemometrics, and calibration models developed. 2D-COS analysis was used to generate synchronous data maps for red and white cask wines spiked with guaiacol, a marker of smoke taint. Correlations were observed at wavelengths that could be attributable to aromatic C-C stretching, i.e., between 1400 and 1500 cm(-1), indicative of volatile phenols. These results demonstrate the potential of 2D-COS as a rapid, high-throughput technique for the preliminary screening of smoke tainted wine.
authors.affiliation: The University of Adelaide, School of Agriculture, Food and Wine, PMB 1, Glen Osmond, SA 5064, Australia.
authors.forename: Anthea L
authors.initials: AL
authors.lastname: Fudge
authors.forename: Kerry L
authors.initials: KL
authors.lastname: Wilkinson
authors.forename: Renata
authors.initials: R
authors.lastname: Ristic
authors.forename: Daniel
authors.initials: D
authors.lastname: Cozzolino
mesh_terms: D006139:Guaiacol / Q000737:chemistry; D015394:Molecular Structure; D012906:Smoke / Q000032:analysis*; D013057:Spectrum Analysis / Q000379:methods*; D014920:Wine / Q000032:analysis*
chemical_list: D012906:Smoke; D006139:Guaiacol