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标题：Analysis of the Acid Detergent Fibre Content in Turnip Greens and Turnip Tops (Brassica rapa L. Subsp. rapa) by Means of Near-Infrared Reflectance
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作者：Sara Obregón-Cano ; Rafael Moreno-Rojas ; Ana María Jurado-Millán 等
期刊名称：Foods
电子版ISSN：2304-8158
出版年度：2019
卷号：8
期号：9
页码：364-378
DOI：10.3390/foods8090364
出版社：MDPI Publishing
摘要：Standard wet chemistry analytical techniques currently used to determine plant fibre constituents are costly, time-consuming and destructive. In this paper the potential of near-infrared reflectance spectroscopy (NIRS) to analyse the contents of acid detergent fibre (ADF) in turnip greens and turnip tops has been assessed. Three calibration equations were developed: in the equation without mathematical treatment the coefficient of determination (R2) was 0.91, in the first-derivative treatment equation R2 = 0.95 and in the second-derivative treatment R2 = 0.96. The estimation accuracy was based on RPD (the ratio between the standard deviation and the standard error of validation) and RER (the ratio between the range of ADF of the validation as a whole and the standard error of prediction) of the external validation. RPD and RER values were of 2.75 and 9.00 for the treatment without derivative, 3.41 and 11.79 with first-derivative, and 3.10 and 11.03 with second-derivative. With the acid detergent residue spectrum the wavelengths were identified and associated with the ADF contained in the sample. The results showed a great potential of NIRS for predicting ADF content in turnip greens and turnip tops.
关键词：Brassica rapa ; turnip greens; turnip tops; acid detergent fibre; NIRS Brassica rapa ; turnip greens ; turnip tops ; acid detergent fibre ; NIRS