Authentication of Zhongning wolfberry with geographical indication by mineral profile. (16th November 2016)

• Record Type: Journal Article
• Authors: Zhang, Senshen; Wei, Yimin; Wei, Shuai; Liu, Hongyan; Guo, Boli
• Is Part Of: International journal of food science & technology. Volume 52:Number 2(2017)
• Page Start: 457
• Page End: 463
• Publication Date: 2016-11-16
• Subjects: Authentication -- inductively coupled plasma mass spectrometry -- linear discriminant analysis -- mineral profile -- principal component analysis -- wolfberry; Food industry and trade -- Periodicals; 664
• DOI: 10.1111/ijfs.13301
• Languages: English
• ISSNs: 0950-5423

Abstract

Summary: Zhongning wolfberry is a famous geographical indication (GI) in China. The concentrations of twenty elements (K, Mg, Fe, Ca, Zn, Cu, Mn, Al, Sr, Rb, Mo, Tb, Cd, Co, V, As, Cs, Pr, Dy and Gd) in samples were determined using inductively coupled plasma mass spectrometry. The data were subjected to analysis of variance, principal component analysis and linear discriminant analysis. The results indicated that nineteen minerals (except K) represented significant differences among regions. The correct classification rates of original group and cross‐validation of Zhongning wolfberry were 95.7% and 85.7%, for these nineteen variables. Furthermore, there was no significant difference for all variables in samples from three picking periods. It was feasible to distinguish Zhongning wolfberry based on mineral profiles with chemometric approaches, and the study could serve as a reference for the authentication of wolfberries and the prevention of deceptive labelling of other GI products. Abstract : The concentrations of 20 elements were determined using inductively coupled plasma mass spectrometry (ICP‐MS) to identify authentic Zhongning wolfberry, which is identified as geographical indication of China. And the correct classification rate of original group and cross‐validation of Zhongning wolfberry were 95.7% and 85.7% respectively. The results showed that it was feasible to distinguish authentic Zhongning wolfberry based on mineral profiles combined with chemometric approaches.