Determination of grape quality at harvest using Fourier-transform mid-infrared spectroscopy and multivariate analysis

被引：0
|
作者：
Versari, Andrea [1 ]
Parpinello, Giuseppina P. [1 ]
Mattioli, Alessia U. [1 ]
Galassi, Sergio [1 ]
机构：
[1] Univ Bologna, Dipartimento Sci Alimenti, I-47023 Cesena, FC, Italy
来源：
AMERICAN JOURNAL OF ENOLOGY AND VITICULTURE | 2008年 / 59卷 / 03期
关键词：
glycerol; gluconic acid; grape infection; FT-MIR;
D O I：
暂无
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
A rapid method for the simultaneous measurement of gluconic acid and glycerol, two important chemical markers of grape infection, was developed using Fourier-transform mid-infrared (FT-MIR) spectroscopy. The method used a combination of FT-MIR with partial-least squares (PLS) regression and compositional data of Trebbiano and Sangiovese grapes obtained with high performance ion-exchange chromatography (HPLC). A total of 320 grape samples were analyzed, including grapes hand picked in the vineyards (200 samples) and mechanically sampled from trucks upon arrival at the wineries (120 samples). Gluconic acid and glycerol increased with increasing percentage of grape infection assessed by visual inspection (r = 0.928). The best result was obtained for gluconic acid (R-2= 0.979; RMSECV = 0.63; RPD = 7.0), indicating that FT-MIR was suitable for process control.
引用
收藏
页码：317 / 322
页数：6
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