期刊
ANALYTICA CHIMICA ACTA
卷 582, 期 1, 页码 125-136出版社
ELSEVIER
DOI: 10.1016/j.aca.2006.08.039
关键词
honey; adulteration; isotopic analyses; stable carbon isotopic ratio analysis by mass spectrometry (SCIRA-MS); site-specific natural isotopic fractionation measured by nuclear magnetic resonance (SNIF-NMR)
Honey samples were analyzed by stable carbon isotopic ratio analysis by mass spectrometry (SCIRA-MS) and site-specific natural isotopic fractionation measured by nuclear magnetic resonance (SNIF-NMR) to first determine their potentials for characterizing the substance and then to combat adulteration. Honey samples from several geographic and botanical origins were analyzed. The delta C-13 parameter was not significant for characterizing an origin, while the (DIH)(I) ratio could be used to differentiate certain single-flower varieties. Application of the official control method of adding a C-4 syrup (AOAC official method 998.12) to our authentic samples revealed anomalies resulting from SCIRA indices that were more negative than -1 parts per thousand (permil). A filtration step was added to the experimental procedure and provided results that were compliant with the natural origin of our honey samples. In addition, spiking with a C-4 syrup could be detected starting at 9-10%. The use of SNIF-NMR is limited by the detection of a syrup spike starting only at 20%, which is far from satisfying. (c) 2006 Elsevier B.V. All rights reserved.
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