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  • 1 ThoMSon Mass Spectrometry Laboratory, Campinas State University - UNICAMP Campinas, SP 13083-970, Brazil
  • | 2 ThoMSon Mass Spectrometry Laboratory, Campinas State University - UNICAMP Campinas, SP 13083-970, Brazil
  • | 3 University of Northern Paraná - UNOPAR Londrina, PR 86041-100, Brazil
  • | 4 Center for Nuclear Energy in Agriculture - CENA - University of S?o Paulo Piracicaba, SP 13400-970, Brazil
  • | 5 ThoMSon Mass Spectrometry Laboratory, Campinas State University - UNICAMP Campinas, SP 13083-970, Brazil
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Summary  

The crude methanolic extracts of a single bean from samples of organic, natural or genetically modified (GM) soybeans [Glycine max. (Merrill) L.] were analyzed by direct infusion electrospray ionization mass spectrometry (ESI-MS). These extracts, containing the most polar natural products of soybeans (free aglycones, monoglucosides, diglucosides and esters including isoflavones and flavones) provide characteristic fingerprinting mass spectra owing to different proportions or sets of components. Spectra distinctiveness is confirmed by chemometric multivariate analysis of the ESI-MS data, which place the three-types of beans into well-defined groups. When ESI-MS is applied, these polar components constitute therefore unique chemotaxonomic markers able to provide fast soybean typification.