期刊
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷 190, 期 -, 页码 283-289出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2017.09.030
关键词
Saffron; Crocin I; Crocin II; Near-infrared spectroscopy; Chemometric techniques; Partial least squares regression
类别
资金
- Major Science and Technology Projects of Breeding New Varieties of Agriculture in Zhejiang Province [2016C02058]
- Zhejiang Agricultural and Forestry University [2013200031, 2013200032]
Saffron is an expensive spice. Its primary effective constituents are crocin I and II, and the contents of these compounds directly affect the quality and commercial value of saffron. In this study, near-infrared spectroscopy was combined with chemometric techniques for the determination of crocin I and II in saffron. Partial least squares regression models were built for the quantification of crocin I and II. By comparing different spectral ranges and spectral pretreatment methods (no pretreatment, vector normalization, subtract a straight line, multiplicative scatter correction, minimum maximum normalization, eliminate the constant offset, first derivative, and second derivative), optimum models were developed. The root mean square error of cross-validation values of the best partial least squares models for crocin I and II were 1.40 and 030, respectively. The coefficients of determination for crocin I and H were 93.40 and 96.30, respectively. These results show that near-infrared spectroscopy can be combined with chemometric techniques to determine the contents of crocin I and II in saffron quickly and efficiently. (C) 2017 Elsevier B.V. All rights reserved.
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