Discrimination of wild Paris based on near infrared spectroscopy and high performance liquid chromatography combined with multivariate analysis

PLoS One. 2014 Feb 18;9(2):e89100. doi: 10.1371/journal.pone.0089100. eCollection 2014.

Abstract

Different geographical origins and species of Paris obtained from southwestern China were discriminated by near infrared (NIR) spectroscopy and high performance liquid chromatography (HPLC) combined with multivariate analysis. The NIR parameter settings were scanning (64 times), resolution (4 cm(-1)), scanning range (10,000 cm(-1)∼4000 cm(-1)) and parallel collection (3 times). NIR spectrum was optimized by TQ 8.6 software, and the ranges 7455∼6852 cm(-1) and 5973∼4007 cm(-1) were selected according to the spectrum standard deviation. The contents of polyphyllin I, polyphyllin II, polyphyllin VI, and polyphyllin VII and total steroid saponins were detected by HPLC. The contents of chemical components data matrix and spectrum data matrix were integrated and analyzed by partial least squares discriminant analysis (PLS-DA). From the PLS-DA model of NIR spectrum, Paris samples were separated into three groups according to the different geographical origins. The R(2)X and Q(2)Y described accumulative contribution rates were 99.50% and 94.03% of the total variance, respectively. The PLS-DA model according to 12 species of Paris described 99.62% of the variation in X and predicted 95.23% in Y. The results of the contents of chemical components described differences among collections quantitatively. A multivariate statistical model of PLS-DA showed geographical origins of Paris had a much greater influence on Paris compared with species. NIR and HPLC combined with multivariate analysis could discriminate different geographical origins and different species. The quality of Paris showed regional dependence.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • China
  • Chromatography, High Pressure Liquid / methods
  • Diosgenin / analogs & derivatives
  • Diosgenin / analysis
  • Diosgenin / chemistry
  • Geography
  • Magnoliopsida / chemistry*
  • Models, Biological
  • Molecular Structure
  • Multivariate Analysis
  • Saponins / analysis*
  • Saponins / chemistry
  • Species Specificity
  • Spectroscopy, Near-Infrared / methods

Substances

  • Saponins
  • polyphyllin I
  • polyphyllin VII
  • Diosgenin

Grants and funding

This work was supported by grants from National Natural Science Foundation of China (81260608 and 81260610), the Special Fund for Agro-Scientific Research in the Public Interest (201303117), the Yunnan Provincial Natural Science Foundation (2013FD066, 2013FZ150). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.