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Analytical and chemometric strategies for elucidation of yerba mate composition 1 1 Introduction 1 2 Material and methods 2 2.1 Chemicals 2 2.2 Sample preparation 2 2.3 Ultrasound-assisted extraction 2 2.4 Spectrophotometric assays 3 2.4.1 Total phenolic content (TPC) 3 2.4.2 Total flavonoid content (TFC) 3 2.4.3 Free radical scavenging effect: DPPH method 3 2.5 Molecular fluorescence spectrometry analysis 3 2.6 Characterization by UHPLC-QTOF-MS 3 2.7 HPLC-DAD analysis 4 2.8 Chemometric procedures 4 3 Results and discussion 4 3.1 UAE parameters optimization 4 3.2 Molecular fluorescence spectrometry and PARAFAC 6 3.3 Chemical characterization by UHPLC-QTOF-MS 7 3.4 Quantification of methylxanthines and phenolic compounds 7 4 Conclusions 9 Declaration of Competing Interest 9 Data availability 9 Acknowledgments 9 Appendix A Supplementary data 9 References 9
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It is typically read by self-directed learners exploring a subject in depth.
Common subject areas: history, science, philosophy, social sciences.
- Language
- EN
- Category
- nonfiction
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