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Title: THE USE OF ELECTRONIC NOSES TO DETERMINE QUALITY ATTRIBUTES IN CITRUS JUICES

Author
item ROUSEFF, RUSSELL - UNIVERSITY OF FL
item BAZEMORE, RUSTY - UNIVERSITY OF FL
item Goodner, Kevin
item PARISH, MICKEY - UNIVERSITY OF FL

Submitted to: Symposium Proceedings
Publication Type: Proceedings
Publication Acceptance Date: 12/1/2001
Publication Date: 7/1/2002
Citation: ROUSEFF, R., BAZEMORE, R., GOODNER, K.L., PARISH, M. THE USE OF ELECTRONIC NOSES TO DETERMINE QUALITY ATTRIBUTES IN CITRUS JUICES. ANNALS OF THE 23RD INTERNATIONAL FEDERATION OF FRUIT JUICE PRODUCERS SYMPOSIUM, HAVANA, CUBA; IFU, PARIS, FRANCE. 2002. v. 23. p. 226-242.

Interpretive Summary: A brief discussion of the types of electronic noses, their working principles and applications to citrus quality problems along with a short overview of electronic nose applications to other food and non-food items is presented. One type of electronic nose (using conducting polymer sensors) could successfully differentiate between heat treatments in both Valencia and Hamlin orange juices. A different type of electronic nose (using metal oxide sensors) had limited success in distinguishing between grapefruit juices of differing flavor quality. A preliminary study evaluating the potential for electronic nose sensors to distinguish microbial contamination indicated that control juices could be distinguished from inoculated juices after two days. Advantages, limitations, and potential of this new technology are compared and contrasted with similar technologies.

Technical Abstract: A brief discussion of the types of electronic noses, their working principles and applications to citrus quality problems along with a short overview of electronic nose applications to other food and non food is presented. A polymer based electronic nose could successfully differentiate between heat treatments in both Valencia and Hamlin orange juices. Volatile profiles of Hamlin juices are affected to a greater degree by heating than similar Valencia juices. A metal oxide electronic nose had limited success in distinguishing between grapefruit juice cultivars and grapefruit juices of different flavor quality. A preliminary study evaluating the potential for electronic noses to distinguish microbial contamination by Saccharomyces cerevisiae indicated that control juices could be distinguished from inoculated juices after two days. Advantages, limitations and potential of this new technology are compared and contrasted with similar technologies.