The influence of experimental parameters on quantitative deuterium measurements for ethyl alcohols of different origin.
J Sci Food Agric
; 100(4): 1812-1815, 2020 Mar 15.
Article
en En
| MEDLINE
| ID: mdl-31821575
ABSTRACT
BACKGROUND:
Quantitative determination with site-specific natural isotope fractionation nuclear magnetic resonance (SNIF-NMR) has been exploited widely in detecting adulteration and for the classification of natural products by their geographical origin.RESULTS:
We compared isotopic parameters such as deuterium / hydrogen (D/H) site specific ratios and the R parameter for alcoholic beverages, obtained using (i) a 500 MHz spectrometer equipped with a dedicated probe for isotopic measurements, and (ii) a 700 MHz spectrometer equipped with a standard probe. The factors affecting the accuracy and precision of quantitative NMR with the second instrument have been explored.CONCLUSIONS:
It has been demonstrated that, in laboratories with a spectrometer that is not equipped with a specific deuterium probe, the selection of the appropriate experimental parameters enables measurements with a similar precision and accuracy as in the case of the official method adopted by the International Organisation of Vine and Wine. © 2019 Society of Chemical Industry.Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Vino
/
Espectroscopía de Resonancia Magnética
/
Deuterio
/
Etanol
Tipo de estudio:
Evaluation_studies
Idioma:
En
Revista:
J Sci Food Agric
Año:
2020
Tipo del documento:
Article
País de afiliación:
Polonia