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Open Access Green as soon as Postprint is submitted to ZB.
Detection of royal jelly adulteration using carbon and nitrogen stable isotope ratio analysis.
Rapid Commun. Mass Spectrom. 20, 181-184 (2006)
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
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
Publisher
Wiley
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Ecological Chemistry (IOEC)