Abstract
THE organic acids in citrus juices are chiefly citric and malic, although tartaric and oxalic acids also have been reported in grapefruit1. In our laboratory, succinic acid was found in frozen mature oranges. Wolf2 isolated citric, malic and an unidentified acid from citrus fruit. Sinclair and Eny3 reported that in the peel malic acid predominates while citric and oxalic acids occur in smaller amounts.
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References
Menchikovsky, F., and Popper, S., Hadar, 5, 181 (1932).
Wolf, Johannes, Fruchtsuft-Ind., 3, 93 (1958); Chem. Abstracts, 52, 20750h (1958).
Sinclair, W. B., and Eny, D. M., Bot. Gaz., 108, 398 (1947).
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Anet, E. F. L. J., and Reynolds, T. M., Nature, 172, 1188 (1953).
Hulme, A. C., and Wooltorton, L. S. C., J. Sci. Food Agric., 9, 150 (1958).
Pigman, W. W., and Goepp, R. M., “Chemistry of the Carbohydrates”, 270 (Academic Press, Inc., New York, 1948).
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TING, S., DESZYCK, E. Isolation of I-Quinic Acid in Citrus Fruit. Nature 183, 1404–1405 (1959). https://doi.org/10.1038/1831404b0
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DOI: https://doi.org/10.1038/1831404b0
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