Use of attenuated total reflectance midinfrared for rapid and real-time analysis of compositional parameters in commercial white grape juice

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dc.contributor.authorShah, N.
dc.contributor.authorCynkar, W.
dc.contributor.authorSmith, P.
dc.contributor.authorCozzolino, D.
dc.date.issued2010
dc.description.abstractA simple and fast midinfrared (MIR) spectroscopy method was developed for simultaneously determining total soluble solids (TSS, degrees Brix), pH, total phenolics, ammonia, free amino nitrogen (FAN), and yeast assimilable nitrogen (YAN) contents in grape juice samples using attenuated total reflectance (ATR). Results from this study demonstrated the capability of ATR-MIR coupled with partial least-squares regression to measure TSS and pH and to monitor FAN, ammonia, and YAN in a wide range of grape juice samples. The standard error in cross-validation and the residual predictive deviation obtained were 0.20 degrees Brix and 9 for TSS, 0.07 and 3.3 for pH, 14.8 mg/L and 2 for ammonia, 28.3 mg/L and 2 for FAN, and 36.9 mg/L and 2 for YAN, respectively. Both the time of analysis and the volume of sample required were considerably reduced as compared to the transmission MIR measurements currently used by the wine industry.
dc.description.statementofresponsibilityNevil Shah, Wies Cynkar, Paul Smith and Daniel Cozzolino
dc.identifier.citationJournal of Agricultural and Food Chemistry, 2010; 58(6):3279-3283
dc.identifier.doi10.1021/jf100420z
dc.identifier.issn0021-8561
dc.identifier.issn1520-5118
dc.identifier.urihttp://hdl.handle.net/2440/89910
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.rightsCopyright © 2010 American Chemical Society
dc.source.urihttps://doi.org/10.1021/jf100420z
dc.subjectAttenuated total reflectance; midinfrared; phenolics; total soluble solids; pH; grape juice
dc.titleUse of attenuated total reflectance midinfrared for rapid and real-time analysis of compositional parameters in commercial white grape juice
dc.typeJournal article
pubs.publication-statusPublished

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