Preparation and Chemical Composition of Orange Oil Concentrates

Authors

  • J. D. VORA,

    1. Author Vora is with Redd Citrus Specialties, 1711 S. 10th St., Safety Harbor, FL 33572. Author Matthews is affiliated with the Dept. of Food Science & Human Nutrition, Univ. of Florida, Gainesville, FL 32611. Author Crandall is with the Univ. of Florida, Agricultural Research & Education Center, Lake Alfred, FL 33850. Author Cook is affiliated with Plymouth Citrus Products Co-op, Plymouth, FL 32768.
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  • R. F. MATTHEWS,

    1. Author Vora is with Redd Citrus Specialties, 1711 S. 10th St., Safety Harbor, FL 33572. Author Matthews is affiliated with the Dept. of Food Science & Human Nutrition, Univ. of Florida, Gainesville, FL 32611. Author Crandall is with the Univ. of Florida, Agricultural Research & Education Center, Lake Alfred, FL 33850. Author Cook is affiliated with Plymouth Citrus Products Co-op, Plymouth, FL 32768.
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  • P. G. CRANDALL,

    1. Author Vora is with Redd Citrus Specialties, 1711 S. 10th St., Safety Harbor, FL 33572. Author Matthews is affiliated with the Dept. of Food Science & Human Nutrition, Univ. of Florida, Gainesville, FL 32611. Author Crandall is with the Univ. of Florida, Agricultural Research & Education Center, Lake Alfred, FL 33850. Author Cook is affiliated with Plymouth Citrus Products Co-op, Plymouth, FL 32768.
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  • R. COOK

    1. Author Vora is with Redd Citrus Specialties, 1711 S. 10th St., Safety Harbor, FL 33572. Author Matthews is affiliated with the Dept. of Food Science & Human Nutrition, Univ. of Florida, Gainesville, FL 32611. Author Crandall is with the Univ. of Florida, Agricultural Research & Education Center, Lake Alfred, FL 33850. Author Cook is affiliated with Plymouth Citrus Products Co-op, Plymouth, FL 32768.
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  • Florida Agricultural Experiment Station Journal Series Number 4226.

  • The assistance of Mr. James Templeton, Pesticide Research Laboratory, Institute of Food & Agricultural Sciences, Univ. of Florida, Gainesville, FL, for the mass spectral analyses is gratefully acknowledged.

ABSTRACT

Flavor and color concentrates were prepared by a vacuum distillation process from cold pressed Valencia and midseason orange oils and were analyzed quantitatively by gas chromatography. Twenty-five major and minor constituents were identified by mass spectrometry. The influence of the concentration process on oxygenated flavor compounds, primarily aldehydes and alcohols, was evaluated. Aldehydes and color values were determined by chemical and spectrophotometric methods. When compared with midseason orange oils, 25–35% higher concentration of oxygenated flavor compounds and of total aldehydes were found in Valencia orange oils. Midseason oils had 20–30% higher color values when compared with Valencia oils. Cold pressed oils concentrated to 25-fold had an increase in color value of 20-fold, while the concentration of oxygenated flavor compounds increased about 10 times.

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