THE COMPARISON OF AN ELECTRONIC NOSE AND GAS CHROMATOGRAPH FOR DIFFERENTIATING NFC ORANGE JUICE

Authors: Goodner, Kevin; Baldwin, Elizabeth - Liz; JORDAN, MARIA - UNIV. OF MURCIA; SHAW, PHILIP - USDA, RETIRED

Submitted to: Proceedings of Florida State Horticultural Society
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 1/6/2002
Publication Date: 6/27/2002
Citation: Goodner, K.L., Baldwin, E.A., Jordán, M.J., Shaw, P.E. The comparison of electronic nose and gas chromatograph for differentiating NFC orange juices. Proceedings of the Florida State Horticultural Society. 2001. v. 114. p. 158-160.

Interpretive Summary: Two instruments, one of which crudely mimics the human nose (called an electronic nose), versus the standard gas chromatograph that measures aroma compounds were compared for detecting differences in aroma of various premium commercial orange juice products. Both types of instruments were able to tell the difference between the different commercial products, although both instruments had their advantages and disadvantages. This is important for evaluation of the various orange juice products for aroma quality, which is critical for U.S. competition in global markets.

Technical Abstract: An electronic nose is compared to a dynamic headspace gas chromatograph (HSGC) for differentiating premium orange juices. Five not-from- concentrate and one from-concentrate juices were analyzed using the electronic nose with an additional not-from-concentrate sample in the GC analyses. Adequate separation was achieved between the samples with some overlap of two of the samples using the electronic nose, and there were 4 distinct clusters of data when using the HSGC. This could indicate similar fruit sources, or a processor providing the juice for two different labels. Both systems provided adequate results for this type of analysis with each instrument having its own advantages and disadvantages.