Study and validity of ^1^3C stable carbon isotopic ratio analysis by mass spectrometry and ^2H site-specific natural isotopic fractionation by nuclear … [An article from: Analytica Chimica Acta]
Study and validity of ^1^3C stable carbon isotopic ratio analysis by mass spectrometry and ^2H site-specific natural isotopic fractionation by nuclear … [An article from: Analytica Chimica Acta]
Last Updated on Wednesday, 14 September 2011 12:24 Written by Administrator Wednesday, 14 September 2011 12:24
Study and validity of ^1^3C stable carbon isotopic ratio analysis by mass spectrometry and ^2H site-specific natural isotopic fractionation by nuclear … [An article from: Analytica Chimica Acta]
This digital document is a journal article from Analytica Chimica Acta, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
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 @d^1^3C parameter was not significant for characterizing an origin, while the (D/H)”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%% (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.
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Tags: Acta, Analysis, Analytica, article, Carbon, Chimica, fractionation, From, isotopic, Mass, Natural, Nuclear, Ratio, sitespecific, Spectrometry, stable, study, validity, ^1^3C
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