Use of near infrared hyperspectral tools for the screening of extractable polyphenols in red grape skins
Use of near infrared hyperspectral tools for the screening of extractable polyphenols in red grape skins
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DOI：
10.1016/j.foodchem.2014.09.112
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发表时间：
2015-04-01
期刊：
影响因子：
8.8
通讯作者：
Miguel Hernandez-Hierro, Jose
中科院分区：
文献类型：
--
作者：
Nogales-Bueno, Julio;Baca-Bocanegra, Berta;Miguel Hernandez-Hierro, Jose
利用近红外高光谱成像系统（900-1700 nm）记录完整葡萄收获时的高光谱图像。利用改进的偏最小二乘回归（MPLS）对光谱数据与红葡萄皮中可提取的多酚（总酚、花青素和黄烷醇）进行了相关性分析。所建模型的测定系数（RSQ）和预测标准误差（SEP）分别为：可提取总酚含量为葡萄皮0.82和0.92 mg g(1)，可提取花青素含量为葡萄皮0.79和0.63 mg g(1)，可提取黄烷醇含量为葡萄皮0.82和0.45 mg g(1)。所获得的结果为快速和合理廉价地筛选完整葡萄中可提取的多酚化合物提供了良好的潜力。此外，还利用该方法对成熟阶段可提取多酚的异质性进行了评价。(C) 2014 Elsevier Ltd.版权所有。
Hyperspectral images of intact grapes were recorded at harvest time using a near infrared hyperspectral imaging system (900-1700 nm). Spectral data have been correlated with red grape skin extractable polyphenols (total phenolic, anthocyanins and flavanols) by modified partial least squares regression (MPLS) using a number of spectral pretreatments. The obtained results (coefficient of determination (RSQ) and standard error of prediction (SEP), respectively) for the developed models were: 0.82 and 0.92 mg g (1) of grape skin for extractable total phenolic content, 0.79 and 0.63 mg g (1) of grape skin for extractable anthocyanin content, 0.82 and 0.45 mg g (1) of grape skin for extractable flavanol content. The obtained results present a good potential for a fast and reasonably inexpensive screening of the extractable polyphenolic compounds in intact grapes. Moreover, the heterogeneity of extractable polyphenols within the ripeness stage has been also evaluated using the proposed method. (C) 2014 Elsevier Ltd. All rights reserved.