期刊
FOOD CHEMISTRY
卷 141, 期 4, 页码 4132-4137出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2013.07.013
关键词
Chinese propolis; Adulteration; FT-NIR; Poplar balata; One-class partial least squares (OCPLS); Partial least squares regression (PLSR)
资金
- National Public Welfare Industry Projects of China [201210010, 201210092, 2012104019]
- National Natural Science Foundation of China [31000357]
- Hangzhou Programs for Agricultural Science and Technology Development [20101032B28]
- Key Scientific and Technological Innovation Team Program of Zhejiang Province [2010R50028]
This paper investigates the feasibility of using FT-NIR spectroscopy and chemometrics for rapid analysis of poplar balata (PB) in Chinese propolis. Because practical adulterations usually involve addition of certain known active components, together with commercial PB, the commonly targeted analysis methods are insufficient to identify PB-adulterated propolis. Untargeted analysis of PB was performed by developing class models of pure propolis using one-class partial least squares (OCPLS). Quantitative analysis of PB was performed using partial least squares regression (PLSR). For untargeted analysis, the most accurate OCPLS model was obtained with SNV spectra with sensitivity 0.960 and specificity 0.941. OCPLS could detect adulterations with 2% (w/w) or more PB. For quantitative analysis, the root mean squared error of prediction (RMSEP) value of PB was 0.902 (w/w, %) with SNV-PLS. FT-NIR spectrometry and chemometrics demonstrate potential for rapid analysis of PB adulterations in Chinese propolis. (C) 2013 Elsevier Ltd. All rights reserved.
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