In:
Rapid Communications in Mass Spectrometry, Wiley, Vol. 20, No. 2 ( 2006-01-30), p. 181-184
Abstract:
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, δ 13 C, δ 15 N) of RJ samples from various European origins and samples from commercial sources were analyzed. Uniform δ 13 C values from −26.7 to −24.9‰ were observed for authentic RJ from European origins. Values of δ 15 N ranged from −1.1 to 5.8‰ depending on the plant sources of nectars and pollen. High δ 13 C values of several commercial RJ samples from −20.8 to −13.3‰ 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 δ 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. Copyright © 2005 John Wiley & Sons, Ltd.
Type of Medium:
Online Resource
ISSN:
0951-4198
,
1097-0231
Language:
English
Publisher:
Wiley
Publication Date:
2006
detail.hit.zdb_id:
2002158-6
detail.hit.zdb_id:
58731-X
SSG:
11
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