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Extraction: Advanced Methods

Extraction: Advanced Methods

Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is formed in...

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Related Experiment Video

Updated: Jul 9, 2026

A Generalized Method for Determining Free Soluble Phenolic Acid Composition and Antioxidant Capacity of Cereals and Legumes

A Generalized Method for Determining Free Soluble Phenolic Acid Composition and Antioxidant Capacity of Cereals and Legumes

Published on: June 10, 2022

Extraction, separation, and detection methods for phenolic acids and flavonoids.

Constantine D Stalikas¹

¹Department of Chemistry, University of Ioannina, Ioannina, Greece. cstalika@cc.uoi.gr

Journal of Separation Science

|December 12, 2007

Summary

This review details analytical methods for phenolic compounds in natural products. It covers traditional and advanced techniques for sample preparation, separation, detection, and identification, offering an overview of recent trends.

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Last Updated: Jul 9, 2026

A Generalized Method for Determining Free Soluble Phenolic Acid Composition and Antioxidant Capacity of Cereals and Legumes

A Generalized Method for Determining Free Soluble Phenolic Acid Composition and Antioxidant Capacity of Cereals and Legumes

Published on: June 10, 2022

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Microwave-Assisted Extraction of Phenolic Compounds and Antioxidants for Cosmetic Applications Using Polyol-Based Technology

Published on: August 23, 2024

Area of Science:

Analytical Chemistry
Natural Product Chemistry

Background:

Phenolic compounds are crucial in natural products, necessitating robust analytical methods.
Hundreds of publications highlight the growing interest in analyzing these compounds over the past two decades.

Purpose of the Study:

To provide an updated and extensive overview of analytical methods for phenolic compounds.
To critically appraise recent developments and trends in the field.
To offer selected bibliographic examples of methods and applications.

Main Methods:

Review of traditional and advanced analytical techniques.
Focus on sample preparation, separation, detection, and identification methods.
Analysis of methods applied to natural product matrices and biological samples.

Main Results:

Identification of a wide array of analytical techniques for phenolic compound analysis.
Assessment of the applicability of these methods in diverse natural product and biological matrices.
Highlighting recent advancements and emerging trends in the field.

Conclusions:

The analysis of phenolic compounds in natural products is a dynamic and evolving field.
A comprehensive understanding of various analytical methods is essential for accurate characterization.
Continued research is vital for refining existing techniques and developing novel approaches.