In-Line Measurement of Color and Total Phenolics during Red Wine Fermentations Using a Light-Emitting Diode Sensor

被引：12

作者：

Shrake, Nicholas L. ^{[1
]}

Amirtharajah, Rajeevan ^{[1
]}

Brenneman, Charles ^{[2
]}

Boulton, Roger ^{[2
]}

Knoesen, Andre ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Elect & Comp Engn, Davis, CA 95616 USA

[2] Univ Calif Davis, Dept Viticulture & Enol, Davis, CA 95616 USA

来源：

AMERICAN JOURNAL OF ENOLOGY AND VITICULTURE | 2014年 / 65卷 / 04期

关键词：

in-line; real-time; total phenolics; red wine color; fermentation; extraction pattern; ABSORBENCY DETECTION; CELL; SPECTROSCOPY; ASTRINGENCY; BITTERNESS; PIGMENTS; GRAPE; HPLC;

D O I：

10.5344/ajev.2014.14023

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：

An in-line color and total phenolic sensor is described to track the color and total phenol evolution during red wine fermentations. The sensor uses multiple light-emitting diodes (LEDs) spanning the ultraviolet and visible spectrum, in particular 280 and 525 nm. The performance of phenolic sensor was evaluated by analyzing fermentation samples collected from multiple red wine fermentations performed during the 2012 season. The study confirmed that the LED phenolic sensor measurements strongly correlate with measurements performed with a reference UV-vis spectrophotometer and that in-line measurements can be made in a practical manner after removal of yeast and pulp with a 2.0 mu m filter. The use of a 100 mu m path-length flow cell avoids the need for dilution, making in-line measurements possible. The sensor provides in-line measurement on the evolution of the total phenolic content and color extraction patterns during red wine fermentations.

引用

页码：463 / 470

页数：8

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