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Online determination of 2H/1H and 13C/12C isotope ratios of cinnamaldehyde from different sources using gas chromatography isotope ratio mass spectrometry

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Abstract

The combination of gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS) and gas chromatography-pyrolysis-isotope ratio mass spectrometry (GC-P-IRMS) is applied to the authenticity assessment of cinnamaldehyde from various sources. For that reason, cinnamon oils were self-prepared by steam distillation from three different varieties of cinnamon bark on the market, C. ceylanicum (ceylon), C. cassia (cassia) and C. burmanii (cassia vera). Furthermore, the so-called wood cinnamon was investigated, which is produced from the outer bark of older branches of cinnamon of minor quality. Self-prepared oils were analysed from commercial cinnamon powder. In addition several commercial samples of cinnamon oil and cinnamaldehyde, some of them declared to be natural, were investigated. δ 2ΗV-SMOW and δ 13CV-PDB values of cinnamaldehyde were determined and characteristic authenticity ranges were deduced, allowing the differentiation between synthetic and natural samples. By correlation of both the δ 2ΗV-SMOW and δ 13CV-PDB values, characteristic authenticity ranges were defined for ceylon, cassia and wood cinnamon. The δ 2ΗV-SMOW and δ 13CV-PDB values of cassia vera samples are in the range of cassia. By comparing the δ 2ΗV-SMOW values of different self-prepared samples (ground bark, distillate) of cinnamon determined by TC/EA-IRMS with the corresponding GC-IRMS values, online GC-IRMS methods are proved to be essential in the authentication of complex natural products.

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Acknowledgement

We thank the Deutsche Forschungsgemeinschaft (DFG) and the Fonds der Chemischen Industrie (FCI) for financial support, the Schuco Gewürze, Nürnberg, Germany and the Sensient Essential Oils, Bremen, Germany for providing samples of cinnamon sticks and essential oils.

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  1. Institut für Lebensmittelchemie, Biozentrum J. W. Goethe Universität, Marie-Curie-Str.9, , 60439, Frankfurt/Main, Germany

    Sabine Sewenig, Uwe Hener & Armin Mosandl

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  1. Sabine Sewenig
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  2. Uwe Hener
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  3. Armin Mosandl
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Correspondence to Armin Mosandl.

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Sewenig, S., Hener, U. & Mosandl, A. Online determination of 2H/1H and 13C/12C isotope ratios of cinnamaldehyde from different sources using gas chromatography isotope ratio mass spectrometry. Eur Food Res Technol 217, 444–448 (2003). https://doi.org/10.1007/s00217-003-0801-5

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  • DOI: https://doi.org/10.1007/s00217-003-0801-5

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