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Quality Assessment and Classification of Goji Berry by an HPLC-based Analytical Platform Coupled with Multivariate Statistical Analysis

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Abstract

Here, a comprehensive approach, based on chromatographic profiles and chemometric methods, was developed for the simultaneous qualitative and quantitative determinations of goji berry. High-performance liquid chromatography with diode-array detection (HPLC-DAD) was employed to acquire the fingerprints of 67 water extracts of goji berries of different varieties and growing years. The results indicated that the correlation coefficients among the samples of the same varieties and growing years were ˃ 0.900, although they varied from 0.726 to 0.986 among samples of different varieties and growing years. Based on these data, the chemometric analysis was applied. Further, principal component analysis (PCA), hierarchical clustering analysis (HCA), and orthogonal partial least squares discriminant analysis (OPLS-DA) were applied for the discrimination of the varieties and the growing years. Moreover, nine marker compounds were obtained as potential references for goji berries of different growing years and 10 other marker components contributed significantly to the varieties differentiation. Precisely, the goji berries of Ningqi No. 7 (N7) and Ningqi No. 9 (N9) were of higher contents than the other three varieties (Ningqi No. 1 (N1), Ningqi No. 5 (N5), and Zhongke Luchuan (ZKLC)), indicating that N7 and N9 were of higher qualities than the others. Conclusively, the chromatographic fingerprint, combined with chemometric methods, could be employed to differentiate the raw materials of different varieties and growing years. Additionally, it could be employed as a rapid and reliable tool for the quality control (QC) of goji berries.

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Acknowledgments

Authors gratefully acknowledge the financial support by the National Science and Technology Major Project (grant number 2018ZX09711001-001-002), the Key Research and Development Program of Gansu Province (grant number 18YF1FA126), the Key Research and Development Program of Ningxia Hui Autonomous Region (grant number 2019BEF02006) and the Major International S&T Cooperation Project from Ministry of Science and Technology of the People’s Republic of China (grant number 2016YFE0129000).

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All authors contributed to the study conception and design. Conceptualization: Duolong Di, Jianteng Wei, and Mei Guo; Material preparation, data collection and analysis: Xuxia Liu, Han Wang, Kaixue Zhang, Jianfei Liu, Maohe Wang, Yuan Gong; Writing original draft preparation: Xuxia Liu; Writing review and editing: Han Wang; Funding acquisition: Duolong Di, Xinyi Huang, and Zhigang Yang; All authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Jianteng Wei or Duolong Di.

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Conflict of Interest

Xuxia Liu declares that she has no conflict of interest. Han Wang declares that she has no conflict of interest. Xinyi Huang declares that he has no conflict of interest. Zhigang Yang declares that he has no conflict of interest. Kaixue Zhang declares that she has no conflict of interest. Jianfei Liu declares that he has no conflict of interest. Maohe Wang declares that he has no conflict of interest. Yuan Gong declares that she have no conflict of interest. Jianteng Wei declares that he has no conflict of interest. Duolong Di declares that he has no conflict of interest. Mei Guo declares that she has no conflict of interest.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Liu, X., Wang, H., Huang, X. et al. Quality Assessment and Classification of Goji Berry by an HPLC-based Analytical Platform Coupled with Multivariate Statistical Analysis. Food Anal. Methods 13, 2222–2237 (2020). https://doi.org/10.1007/s12161-020-01827-y

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  • DOI: https://doi.org/10.1007/s12161-020-01827-y

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