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Titre :	Methods in polyphenol analysis. Ajouter au panier
Auteur(s) :	C. Santos-Buelga, Éditeur scientifique G. Williamson, Éditeur scientifique
Type de document :	Livre
Sujets :	COMPOSE PHENOLIQUE ; EXTRACTION ; PRODUIT ALIMENTAIRE ; SPECTROSCOPIE ; TECHNIQUE ENZYMATIQUE ; TECHNIQUE ANALYTIQUE ; CHROMATOGRAPHIE GAZ LIQUIDE ; FLAVONOIDE ; ANTHOCYANE
Editeur(s) :	Cambridge : Royal Society of Chemistry
Date de publication :	2003
Format :	383 p.
Note(s) :	Bibliographie Illustrations Index
Table des matières :	Chapter 1 : Polyphenol Extraction from Foods 1 Introduction 2 Solvent Extraction Factors that Influence the Efficiency of Solvent Extraction Sample Preparation The Extraction Process Solvent Extraction Using Different pH Values Solvent Extraction of Anthocyanins Solvent Extraction of Flavan-3-ols Auxiliary Operations Microwave-assisted Extraction 3 Solid-phase Extraction Fractionation of Phenolic Compounds Chapter 1 : Polyphenol Extraction from Foods 1 Introduction 2 Solvent Extraction Factors that Influence the Efficiency of Solvent Extraction Sample Preparation The Extraction Process Solvent Extraction Using Different pH Values Solvent Extraction of Anthocyanins Solvent Extraction of Flavan-3-ols Auxiliary Operations Microwave-assisted Extraction 3 Solid-phase Extraction Fractionation of Phenolic Compounds Solid-phase Extraction of Anthocyanidins Solid-phase Extraction of Proanthocyanidins 4 Supercritical Fluid Extraction 5 Pressurized Liquid Extraction References Chapter 2 : Methods of Polyphenol Extraction from Biological Fluids and Tissues 1 Introduction Primary Considerations 2 Polyphenol Extraction Solvent Extraction Comparing Solvents for Extraction of Quercetin Conjugates Solid-phase Extraction 3 Hydrolysis Acid Hydrolysis Enzymic Hydrolysis 4 Particular Problems with Sulfate determination 5 Storage of Samples 6 Summary References Chapter 3 : Application of LC-MS for the Identification of Polyphenols 1 Introduction 2 Analysis of Anthocyanins and Derived Pigments Methodology Results 3 Analysis of Catechins and Proanthocyanidins Methodology Results 4 Analysis of Flavonols and Flavonol Metabolites Methodology Results Acknowledgements References Chapter 4 : The Use of HPLC with Coulometric Detection in the Analysis of Flavonoids in Complex Matrices 1 Introduction 2 Basics of Electrochemistry 3 Principle of Coulometric Array Detection 4 Determination of Analysis Conditions 5 Sensitivity in Coulometric Detection 6 Analysis of Flavonoids Using HPLC with Coulometric Array Detection 7 Voltammetric Characteristics of Flavonoids 8 Conditions of Analysis for Each Class of Flavonoid 9 Specific Applications of Coulometric Array Detection in the Field of Flavonoid Bioavailability 10 Specific Applications of Coulometric Array Detection in the Field of Food Analysis Use of Fingerprints Estimation of the Overall Antioxidant Capacity 11 Conclusions Acknowledgements References Chapter 5 : On-line Identification of Flavonoids by HPLC Coupled to Diode Array Detection 1 Introduction 2 Anthocyanins RP-HPLC Elution Characteristics Spectral Characteristics 3 Flavan-3-ols (Catechins, Proanthocyanidins, Condensed Tannins) 4 Flavones and Flavonols Chromatographic Behaviour UV-visible Spectroscopy 5 Flavanones, Dihydroflavonols and Isoflavonoids Flavanones Dihydroflavonols Isoflavonoids 6 Chalcones and Aurones Chalcones Aurones 7 Dihydrochalcones References Chapter 6 : Application of LC-NMR in the Structure Elicidation of Polyphenols 1 Introduction 2 Principle of Operation of LC- NMR Solvent Suppression Operation in the On-flow Mode Operation in the Stop-flow Mode Sensitivity Limitations Hardware Set-up 3 Generalities on the 1H-NMR of Polyphenols 4 Strategies for the On-line Identification of Polyphenols 5 Stop-flow LC-1H-NMR of the Flavonoids and Xanthones from Gentiana ottonis 6 Stop-flow LC-1H-NMR with 2D Correlation Experiments for the Structure Elucidation of a Flavanone of Monotse englerii 7 On-flow LC-1H-NMR Characterisation of the Isoflavone and Isoflavanone Constituents of Erythrina vogelii Preliminary LC-UV-DAD and High Resolution LC-APCI-Q TOF-MS-MS Analyses Low-flow LC-NMR with Microfractionation LC-UV-DAD with Post-column Derivatisation Interpretation of the On-line Data 8 Other Applications of LC- NMR for the Study of Polyphenols 9 Conclusions References Chapter 7 : Polyphenols: Measurement and Calculation of Their Physical Chemistry Properties 1 Introduction 2 Free Radical Chemistry of Flavan-3-ols Generation of Phenoxyl Radical by Pulsed Radiolysis and Flash Photolysis Radiolytic Experiments on Simple Phenols Radiolytic Experiments on Flavan-3-ols Flash Photolysis Experiments on Selectively Protected Flavan-3-ols 4 Redox Properties of Flavan-3-ols 3 Acid-Base Properties of Flavan-3-ols Determination of Redox Potential of Phenol by Pulse Radiolysis Simple Phenols Polyphenols Determination of Redox Potential by Fast Cyclic Voltammetry on Selectively Protected Flavan-3-ols 5 Conclusion and Perspectives: A New Insight into Antioxidative Properties of Flavan-3-ols References Chapter 8 : Enzymatic Synthesis of Quercetin Glucosides and Glucuronides 1 Introduction 2 Production of Quercetin Glycosides Preparation of Crude Onion Enzyme Extract Preparation of Crude Leek Enzyme Extract Enzymatic Synthesis of Quercetin Glycosides Enzymatic Synthesis of Radio-labelled Quercetin Glycosides HPLC Analysis for Flavonoids 3 Production of Quercetin Glucuronides Production of Pig Liver Extract Enzymatic Synthesis of Flavonoid Glucuronides Enzymatic Synthesis of Radio-labelled Quercetin Glucuronides Liquid Chromatography-Mass Spectrometry (LC-MS) HPLC Analysis for Flavonoids 4 Concluding Remarks Acknowledgements References Chapter 9 : Chemical Synthesis of Flavonoid Conjugates 1 Introduction 2 Strategies for the Preparation of Flavonoid Conjugates The Total Synthesis of Basic Structures The Hemisynthesis of Conjugates 3 Typical Experimental Procedures 2,4-Dihydroxyphenyl-4-hydroxybenzyl Ketone 2,4,6- Trihydroxyphenyl-4-hydroxybenzyl Ketone Daidzein oméga-Methoxyphoracetophenone 3,4-Dihydroxybenzoyl Chloride 3-Methylquercetin Daidzein 7-Sulfate Potassium Salt Quercetin 3-Sulfate Quercetin 3' -Sulfate Quercetin 7-bêta-D-Glucuronide (and Quercetin 4'-bêta-D-Glucuronide) Daidzein 7-Glucuronide Quercetin 3-0-b-D-Glucuronide Isorhamnetin Rhamnetin 4' -Methylcatechin and 3' -Methylcatechin References Chapter 10 : Quantitative Determination of Flavonols in Plant Foods and Biological Fluids 1 Introduction 2 Flavonols in Plant Foods UV Detection of Total Flavonols after Acid Hydrolysis UV Detection of Individual Flavonol Glycosides 3 Flavonols in Biological Fluids Fluorescence Detection of Total Flavonols after Acid Hydrolysis Electrochemical Detection of Conjugated Flavonols and of Total Flavonols after Enzymatic Hydrolysis References Chapter 11 : Analysis and Purification of Catechins and Their Transformation Products 1 Introduction 2 Catechin and Related Compound Isolation Extraction Separation Protocols Physical Properties of Fresh Leaf Flavan-3-ols and Related Compounds NMR Spectroscopy of Fresh Leaf Flavan-3-ols and Related Compounds 3 Flavan-3-ol Dimeric Oxidation Products Extraction Separation Protocols Physical Properties of Black Tea Dimeric Flavonoid Oxidation Products 4 Flavan-3-ol Polymeric Oxidation Products Roberts Fractionation Theafulvin Fractionation Black Tea Fractionation by Solvent Precipitation 5 Determination of Total Polyphenols in Tea Using the Folin-Ciocalteu Reagent Reagents Apparatus Preparation of test sample Procedure Appendix A: HPLC Conditions for Flavan-3-ol Dimeric Oxidation Products Appendix B: Structures of Flavan-3-ol Dimeric Oxidation Products References Chapter 12 : Analysis and Purification of Proanthocyanidin Oligomers 1 Introduction 2 Extraction and Purification of Proanthocyanidin Oligomers Extraction Purification 3 Characterization of Proanthocyanidin Oligomers Thiolysis Mass Spectrometry NMR 4 Quantification of Proanthocyanidin Oligomers Colorimetric Methods Reversed-phase HPLC Normal-phase HPLC Detection 5 Conclusion References Chapter 13 : Analysis of Polymeric Proanthocyanidins and Complex Polyphenols 1 Introduction 2 Structure of Proanthocyanidin Polymers and Tannin-like Compounds Proanthocyanidins Tannin-like Compounds 3 Analysis and Characterization Extraction from Plant Tissues Sample Clean-up by Liquid-liquid or Solid-phase Extraction Fractionation According to Molecular Weight Quantitation and Characterization of Polymeric Tannins 4 Conclusion References Chapter 14 : The Analysis and Characterization of Chlorogenic Foods and Other Cinnamates 1 Introduction 2 The Cinnamate Conjugates The Chlorogenic Acids Other Cinnamate Conjugates Cinnamate Transformation Products 3 Analysis and Characterization Structure and Hydrophobicity Extraction from Plant Tissues Extraction from Animal Tissues Sample Clean-up by Solvent Partition and Solid-phase Adsorption Artefacts Hydrolysis/Saponification Availability of Authentic Standard Compounds Chromatography Spectroscopic and Other Physical Properties Mass Spectroscopy References Chapter 15 : Analysis of Anthocyanins 1 Introduction 2 Chemistry Structure Stability 3 Methods of Analysis Extraction Isolation and Purification Detection and Identification Techniques of Hydrolysis References Chapter 16 : Analysis and Purification of Flavanones, Chalcones and Dihydrochalcones 1 Introduction 2 Extraction 3 Chemical Transformation 4 Chromatographic Analysis 5 Isolation and Purification 6 UV Spectroscopy Flavanones Chalcones Dihydrochalcones 7 1H NMR Spectroscopy Flavanones Chalcones Dihydrochalcones 8 HPLC-ESI (Electrospray lonization) Mass Spectrometry References Subject Index
Langue(s) :	Anglais
Identifiant :	978-0-85404-580-8
Lien vers la notice :	https://infodoc.agroparistech.fr/index.php?lvl=notice_display&id=67555

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