American Chemical Society. Division of Agricultural and Food Chemistry

Charlotta Turner

During the last ten years, several new extraction techniques have been developed that are faster, more automated and use less organic solvents compared to classical solvent extraction techniques. Furthermore, there is a clear trend going towards the use of (and research on) environmentally sustainable methods, which is encouraging for the future. Supercritical fluid extraction (SFE) and pressurized liquid extraction (PLE) are two of the most useful techniques for extraction of non-polar and medium polar solutes from solid and semi-solid samples. These techniques commonly use pressurized carbon dioxide or hot liquids such as water as extraction solvents, respectively. For aqueous samples, stir-bar sorptive extraction (SBSE) has recently been developed. These are some of the techniques that will be described in the proposed symposium series book. Focus will be on the extraction of various compounds from food and agricultural samples in either an analytical or a process-scale point-of-view. Several of the book chapters will compare the different techniques, and describe their advantages and disadvantages. Applications discussed in this book include SFE of biopolymers from distillers dried grains, SFE of lipids from oilseeds, PLE of functional ingredients from plants and herbs, tandem SFE/PLE of acrylamide from potato chips, SFE and PLE of cholesterol and fat from hamster liver, and steam distillation-extraction (SDE) and SBSE of flavors from shitake mushrooms.

Food and Agricultural Samples

Modern Extraction Techniques

Akiva Pour-El

Based on a Symposium

Functionality and Protein Structure

Institute of Food Technologists

American Society of Flavor Chemists

"A visual and musical hymn of praise to what Andrés Segovia describes as 'the pride, strength, and reverence of the Spanish soul.' That soul is exhibited through the remarkable music of Spanish composers: Isaac Albéniz, Manuel de Falla, Enrique Granados, and Federico Moreno Torroba; and a gifted group of painters El Greco, Goya, and Velásquez. Madrid's El Prado Museum serves as the backdrop for musical performances by pianist Alicia de Larrocha, soprano Victoria de los Angeles, and guitarist Andrés Segovia who also doubles as our host on a tour of this famous building. Also seen is Spain's native art form, flamenco, as sung by Roque Montoya and danced by Coros y Danzas de España."--Container.

Chemistry and Technology

The Quality of Foods and Beverages

V.K. Agarwal

In 18 papers delivered at a symposium in New York City, August 1991, chemists review recent developments in techniques to test meat, poultry, milk, and other food of animal origin, for residues of antibiotics and other drugs used for such purposes as improving feed efficiency or promoting growth. Mo

Analysis of Antibiotic/Drug Residues in Food Products of Animal Origin

Cynthia J. Mussinan

Michael J. Morello

Filled with practical examples, this volume illustrates innovative flavor analysis techniques used by today's leaders in food chemistry. It covers flavor analysis for apples, beef, citrus, coffee, cheese, extruded pet foods, fungi, milk, and Maillard reaction systems, and the researchers come from throughout the industrialized world. Eleven of the chapters illustrate techniques for isolating volatile compounds from complex food matrices, including micro-scale liquid-liquid extraction, headspace sampling, solid phase microextraction, supercritical fluid extraction, and thermo desorption. The chapters devoted to analytical characterization include analyses of Amadori compounds, sulfur compounds, chiral compounds, coumarins and psoralens, flavor precursors, and natural products by GC, GC-MS, HPLC-MS, CCC (countercurrent chromatography), and GC-IRMS (gas chromatography isotope ration mass spectrometry). The final section covers sensory characterization and describes examples using the gas chromatography-olfactory techniques OSME and AEDA as well as the new GC-SOMMSA (selective odorant measurement by multisensor array).

Developments in Isolation and Characterization

Flavor Analysis

American Chemical Society. Meeting

Chang Y. Lee

John R. Whitaker

Describes the chemistry, structure, and function of polyphenol oxidase. Covers the molecular biology of polyphenol oxidase. Describes the chemistry of enzymatic browning. Provides practical methods for preventing enzymatic browning in fruit and vegetable products. Valuable reading for chemists, molecular biologists, food scientists, and food technologists.

Enzymatic Browning and Its Prevention

American Chemical Society. Division of Agricultural and Food Chemistry

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