Extraction of Organic Analytes from Foods is a laboratory manual of methods used for the preparation and extraction of organic chemical compounds from food sources. It offers ideas on how to facilitate progress towards the total automation of the assay, as well as proposing assays for unknowns by comparison with known methods.

Beginning with an introduction to extraction methodology, Extraction of Organic Analytes from Foods then progresses through sample preparation, extraction techniques (partition, solvation, distillation, adsorption and diffusion) and applications.

Subject indices for the applications are organized by commodity, method, chemical class and analyte, and provide useful examples of references from the literature to illustrate historical development of the techniques.

Extraction of Organic Analytes from Foods contains examples of methods that have been compared, combined or used in collaborative trials. They have been correlated and used to form the beginnings of a database that can be expanded and updated to provide a laboratory reference source.

Contents

Methodology and Proximate Analysis

• Extraction of organic analysis
• Sampling
• Preparation for extraction
• General approach to the extraction of analytes
• Resumé of extraction methods
• Proximate analysis of the major food components

Sample Preparation for Extraction

• Change of volume
• Change of pH
• Change of structure
• Change of state
• Change of chemical composition
• Automation and miniaturization

Partition

• Gas/liquid partition
• Liquid/liquid partition
• Solid/liquid partition
• Applications of partition-extraction

Solvation

• Solvent extraction
• Matrix solid-phase dispersion
• Sub-critical fluid extractions
• Supercritical fluid extraction

Distillation

• Steam distillation
• Organic solvent distillation-extraction
• simultaneous steam distillation-extraction
• Sweep co-distillation

Adsorption

• Solid-phase extraction
• Solid-phase microextraction
• High concentration capacity extractions

Diffusion

• Microporous membrane liquid-liquid extractions
• Membrane-assisted solvent extraction
• Sorbent impregnated membranes
• Supported liquid membrane extraction
• Pervaporation
• Dialysis
• filtration

Appendices

• Comparisons of extraction methods
• Combinations of preparation/extraction methods
• Interlaboratory collaborative trials
• Examples of preparation and extraction schemes
• Literature examples of Soxhlet extractions

Index

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