Rapid Determination of Total Thujone in Absinthe Using 1 H NMR Spectroscopy

  • Monakhova Y
  • Kuballa T
  • Lachenmeier D
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1 H NMR spectroscopy is utilized to quantify total thujone (sum of α - and β -isomers) in absinthe. For sample preparation, a simple dilution with buffer is required. Thujone produces a distinct peak of the CH 2 group in the cyclopentanone moiety in the 2.13–2.11 ppm range. No overlap with other typical constituents such as anethole or fenchone occurs. The detection limit of 0.3 mg/L is adequate to control the EU maximum limit. The relative standard deviation was 6%, and linearity was observed from 1 to 100 mg/L. Applicability was proven by analysis of 69 authentic absinthes. The correlation between NMR and our previous method consisting of liquid-liquid extraction followed by GC/MS was significant ( P < 0.0001 , R = 0.93 ). The simple and cheap NMR method can be used for rapid screening of absinthes for total thujone content while chromatographic techniques are recommended for more specific ( α - and β -thujone isomers) analysis if required.




Monakhova, Y. B., Kuballa, T., & Lachenmeier, D. W. (2011). Rapid Determination of Total Thujone in Absinthe Using  1  H NMR Spectroscopy . International Journal of Spectroscopy, 2011, 1–5. https://doi.org/10.1155/2011/171684

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