Scientists Take Charge to Squeeze More Potential From Orange Peels
As oranges are peeled, they spray a tangy, citrus scented oil into the air. The main compound in the fragrant mist is limonene, which can be collected from discarded peels and used in flavorings, perfumes, and all-purpose cleaners. Now, researchers reporting in ACS’ Journal of Agricultural and Food Chemistry have treated limonene with electricity and ethanol, transforming it into a mixture of pleasant-smelling aroma compounds, some of which haven’t been identified before.
Limonene is regularly used in its original form, but it can also be the starting platform for other scents. Synthetic oxidation techniques that can perform this transformation have traditionally required environmentally harmful substances, such as strong chemicals and heavy metals.
The simple, sustainable method could create valuable aroma compound mixtures for flavorings or fragrances, but the compounds must be evaluated for safety before use in commercial products, researchers say.
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