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Article

Optical Rotation—A Reliable Parameter for Authentication of Honey?

by
Dessislava Gerginova
1,
Vanya Kurteva
2 and
Svetlana Simova
1,*
1
Bulgarian NMR Centre, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
2
Laboratory Organic Synthesis and Stereochemistry, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
*
Author to whom correspondence should be addressed.
Molecules 2022, 27(24), 8916; https://doi.org/10.3390/molecules27248916
Submission received: 15 November 2022 / Revised: 5 December 2022 / Accepted: 9 December 2022 / Published: 15 December 2022
(This article belongs to the Special Issue The Chemistry of Honey and Other Bee Products: Novel Applications and Quality)
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Abstract

The controversial question of whether optical rotation data can be used to distinguish floral from honeydew honey was investigated. Specific optical rotation angles were determined for 41 honey samples, including floral, honeydew, and adulterated honey, indicating that moderate to high positive optical rotation angles were found for all adulterated samples measured. A strong correlation between the sugar profile and the specific optical rotation angle of honey was confirmed, and a method based on 13C NMR metabolomics was proposed to calculate specific optical rotation angles with good correlation with the experimental values. The results indicate that optical rotation is not a reliable method for distinguishing the origin of honey but could indicate adulteration.
Keywords: floral; honeydew and adulterated honey; optical rotation; 13C NMR; botanical origin floral; honeydew and adulterated honey; optical rotation; 13C NMR; botanical origin
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MDPI and ACS Style

Gerginova, D.; Kurteva, V.; Simova, S. Optical Rotation—A Reliable Parameter for Authentication of Honey? Molecules 2022, 27, 8916. https://doi.org/10.3390/molecules27248916

AMA Style

Gerginova D, Kurteva V, Simova S. Optical Rotation—A Reliable Parameter for Authentication of Honey? Molecules. 2022; 27(24):8916. https://doi.org/10.3390/molecules27248916

Chicago/Turabian Style

Gerginova, Dessislava, Vanya Kurteva, and Svetlana Simova. 2022. "Optical Rotation—A Reliable Parameter for Authentication of Honey?" Molecules 27, no. 24: 8916. https://doi.org/10.3390/molecules27248916

APA Style

Gerginova, D., Kurteva, V., & Simova, S. (2022). Optical Rotation—A Reliable Parameter for Authentication of Honey? Molecules, 27(24), 8916. https://doi.org/10.3390/molecules27248916

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