PREDICTION OF SOME PHYSICOCHEMICAL PARAMETERS IN RED WINES FROM ULTRAVIOLET-VISIBLE SPECTRA USING A PARTIAL LEAST-SQUARES MODEL IN LATENT-VARIABLES

被引:15
作者
GARCIAJARES, C [1 ]
MEDINA, B [1 ]
机构
[1] LAB INTERREG BORDEAUX,DIRECT GEN CONCURRENCE CONSOMMAT & REPRESS FRAUDE,F-33405 TALENCE,FRANCE
关键词
RED WINE; MULTIVARIATE CALIBRATION; PREDICTION OF CHEMICAL COMPOSITION; PARTIAL LEAST-SQUARES IN LATENT VARIABLES; PREDICTION QUALITY;
D O I
10.1039/an9952001891
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A method for the rapid prediction of some physico-chemical parameters usually determined by classical methods in red wines (fetal acidity, volatile acidity, pH, free sulfur dioxide, tannins and total anthocyans) from the UV/VIS spectrum is proposed. A partial least-squares (PLS) model in latent variables was developed to relate the chemical variables to the spectra, Prediction of composition was achieved with a low prediction error in young red wines, some of them 'Grand Cru' from the Bordeaux production area, A similar procedure was applied to commercial red wines, that constituted a more heterogeneous group, with acceptable results. Finally, the model was extended to any red wine, without loss of prediction quality. In the last case, prediction errors were: total acidity, 5.0%; volatile acidity, 9.9%; free sulfur dioxide, 29%; pH, 3.3%; tannins, 11% and total anthocyans, 22%.
引用
收藏
页码:1891 / 1896
页数:6
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