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Stocker, A. ; Rossmann, A.* ; Kettrup, A. ; Bengsch, E.

Detection of royal jelly adulteration using carbon and nitrogen stable isotope ratio analysis.

Rapid Commun. Mass Spectrom. 20, 181-184 (2006)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Stable isotope ratios ((13)C/(12)C and (15)N/(14)N) were measured in royal jelly (RJ) samples by isotope ratio mass spectrometry (IRMS) to evaluate authenticity and adulteration. Carbon and nitrogen isotope contents (given as delta values relative to a standard, delta(13)C, delta(15)N) of RJ samples from various European origins and samples from commercial sources were analyzed. Uniform delta(13)C values from -26.7 to -24.9 per thousand were observed for authentic RJ from European origins. Values of delta(15)N ranged from -1.1 to 5.8 per thousand depending on the plant sources of nectars and pollen. High delta(13)C values of several commercial RJ samples from -20.8 to -13.3 per thousand indicated adulteration with high fructose corn syrup (HFCS) as a sugar source. Use of biotechnologically produced yeast powder as protein source for the adulterated samples was assumed as delta(15)N values were lower, as described for C(4) or CAM plant sources. RJ samples from authentic and from adulterated production were distinguished. The rapid and reliable method is suitable for urgent actual requirements in food monitoring.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords royal jelly adulteration; stable isotope ratio analysis
ISSN (print) / ISBN 0951-4198
e-ISSN 1097-0231
Quellenangaben Volume: 20, Issue: 2, Pages: 181-184 Article Number: , Supplement: ,
Publisher Wiley
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Ecological Chemistry (IOEC)