Application of absorbance values used in wineries for estimating CIELAB parameters in red wines
Application of absorbance values used in wineries for estimating CIELAB parameters in red wines
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DOI：
10.1016/s0308-8146(02)00509-5
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发表时间：
2003-05-01
期刊：
影响因子：
8.8
通讯作者：
González-Sanjosé, ML
中科院分区：
文献类型：
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作者：
Pérez-Magariño, S;González-Sanjosé, ML
对多元和简单的回归分析进行了评估，以建立数学模型，允许根据420、520和620 nm的吸光度值来评估CIELAB参数。对180种商品红葡萄酒进行了所有这些变量的测量，得到了其中130个变量的数学模型。结果表明，CIED65/10度光源/观察者条件下的CIELAB参数L*、a*和C*可以作为自变量从520 nm处的吸光度中正确地估计出来(估计的标准误差很小)。然而，参数h和b*的预测值和观测值之间的平均误差较大，但使用吸光度分别为420、520和620 nm(b*)的多元线性回归模型或以A420和A520的比率(H)作为自变量(H)可以正确地估计它们。对于一般没有必要的设备和软件来确定CIELAB参数的葡萄酒厂来说，所获得的模型可能会有所帮助，CIELAB参数被认为是定义葡萄酒颜色的最佳参数。(C)2002爱思唯尔科学有限公司。保留所有权利。
Multiple and simple regression analyses were assessed to establish mathematical models that allow the evaluation of CIELAB parameters from absorbance values at 420, 520 and 620 nm. All these variables were measured in 180 commercial red wines, using 130 of them to obtain the mathematical models. The results showed that the CIELAB parameters L*, a* and C* for the CIE D65/10degrees illuminant/observer conditions can be correctly estimated (with small standard error of estimation) from absorbance values at 520 nm, as an independent variable. However, the parameters h and b* showed higher average errors between the predicted and observed values, but they were correctly estimated using multiple linear regression models with the three absorbances at 420, 520 and 620 nm (b*) or using the ratio of A420 to A520 as independent variable (h). The models obtained could be helpful to wineries that in general, do not have the necessary equipment and software to determine the CIELAB parameters, which are recognized as being the best parameters for defining the colour of wines. (C) 2002 Elsevier Science Ltd. All rights reserved.