Zusammenfassung
Israelischer Orangensaft, -Pulp und -Schalen, aus handelsüblichen Herstellungsanlagen während der Verarbeitungszeit 1981/82 wurden auf ihre Spektralcharakteristik untersucht. Die im UV sichtbare Absorption alkoholischer Lösungen wurde erfaßt. Die Absorptionskurven für die drei Produkte waren ähnlich, ausgenommen die Absorptionintensitäten und das Fehlen eines deutlichen Maximums bei 280 nm für Orangensaft. Die hohe Variabilität der Absorptionscharakteristik bei Orangensaft zeigte, daß israelischer Orangensaft stark durch Umwelt- und landtechnische Faktoren beeinflußt wird.
Summary
Israeli orange juice, orange pulp and orange peel obtained from commercial processing plants during the 1981/82 processing season were analyzed for their spectral characteristics. UV-visible absorption of ethanolic solutions were analyzed. The absorption curves for the three products were similar, except for absorption intensities and lack of a distinct maximum at 280 nm for orange juice. The high variability in absorption characteristics observed in orange juice indicated that Isreali orange juice is strongly affected by environmental and agrotechnical factors.
This is a preview of subscription content, log in via an institution to check access.
References
Bricout J (1973) Control of authenticity of fruit juice by isotopic analysis. J Assoc Off Anal Chem 56:739
Brown MB, Cohen E (1983) Discussion of statistical methods for determining purity of citrus juice. J Assoc Off Anal Chem 66:781
Cohen E, Saguy I (1984) Measurement of18O/16O stable isotopes ratio in citrus juice: a comparison of preparation methods. J Agric Food Chem 32:28
Lifshitz A, Stepak I, Brown MB (1974) Methods for testing the purity of Israeli citrus juice. J Assoc Off Anal Chem 57:1169
Petrus DR, Vandercook CE (1980) Methods for the detection of adulteration in processed citrus products. In: Nagy S, Attaway JA (eds) Citrus Nutrition and Quality. American Chemical Society, Washington, DC
Schatzki TF, Vandercook CE (1978) Non-parametric methods for detection of adulteration of concentrated orange juice for manufacturing. J Assoc Off Anal Chem 61:911
Vandercook CE, Navarro JL, Smolensky DC, Nelson DB, Park GL (1983) Statistical evaluation of data for detecting adulteration of California Navel orange juice. J Food Sci 48:636
Park GL, Byers JL, Pritz CM, Nelson DB, Navarro JL, Smolensky DC, Vandercook CE (1983) Characteristics of California Navel orange juice and pulpwash. J Food Sci 48:627
Petrus DR, Attaway JA (1980) Visible and ultraviolet absorption and fluorescence excitation and emission characteristics of Florida orange juice and orange pulpwash: Detection of adulteration. J Assoc Off Anal Chem 63:1317
Petrus DR, Dougherty MH (1973) Spectral characteristics of three varieties of Florida orange juice. J Food Sci 38:659
Dixon WJ (Ed) (1981) BMDP-Statistical Software. University of California Press, Berkeley, CA
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Saguy, I., Cohen, E. Spectral characteristics of Israeli orange products. Z Lebensm Unters Forch 178, 386–388 (1984). https://doi.org/10.1007/BF01042233
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01042233