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Prediction of phenolic composition of shiraz wines using attenuated total reflectance mid-infrared (ATR-MIR) spectroscopy

journal contribution
posted on 11.12.2017, 00:00 authored by R Ristic, Daniel CozzolinoDaniel Cozzolino, DW Jeffery, JM Gambetta, SEP Bastian
Phenolic compounds play a critical role in determining red wine color, taste, flavor, and mouthfeel sensory attributes. Additionally, they contribute to wine aging and provide wine stability. This study evaluated the use of an attenuated total reflection (ATR) mid-infrared (MIR) spectroscopy to measure phenolic compounds in Shiraz wine samples of different quality levels obtained from 24 Australian wine geographical indications. Partial least squares (PLS) regression using the second derivative of the whole MIR spectrum produced the coefficient of determination (R2) in calibration and standard error in cross-validation (SECV) for different attributes. In particular, SO2-resistant pigments had R2 = 0.58 (SECV=0.58 au), total anthocyanins had R2 = 0.61 (SECV=32 mg/L), wine color density had R2 = 0.51 (SECV=0.56 au), and total phenolics had R2 = 0.60 (SECV=5.7 au). These results demonstrated the potential use of ATR-MIR spectroscopy with PLS regression as a rapid method to measure important parameters related to red wine phenolic composition and wine quality. © 2016 by the American Society for Enology and Viticulture. All rights reserved.

History

Volume

67

Issue

4

Start Page

460

End Page

465

Number of Pages

6

eISSN

1943-7749

ISSN

0002-9254

Publisher

American Society for Enology and Viticulture, USA

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

University of Adelaide

Author Research Institute

Institute for Future Farming Systems

Era Eligible

Yes

Journal

American Journal of Enology and Viticulture