Vergleich der Deuterium-und Kohlenstoff-13-Gehalte in Fermentations-und Syntheseethanol/Comparison of the Deuterium and Carbon-13 Contents of Ethanol Obtained by Fermentation and Chemical Synthesis
2014
Rauschenbach, Peter | Simon, Helmut | Stichler, Willibald | Moser, Heribert
The ratios of deuterium to hydrogen and carbon-13 to carbon-12 expressed as δ D ‰ and d ¹³C ‰ , respectively, were determined in ten synthetical ethanols of different origin and compared with those of 28 samples of ethanol which were prepared from plant material grown in different places and at different times. The δ D values of the synthetic ethanols are between - 117‰ and - 140‰ and those for ethanol obtained by fermentation between - 200‰ and - 272‰. Using glucose samples of different origins with δ D values between - 3‰ and - 76‰ and water of a δ D value of - 77‰ led to ethanol with drastically diminished deuterium contents ranging from δ D values of -211 to -247‰. The differences of the δ ¹³C values between ethanols obtained by fermentation of C₃ and C₄-plant carbohydrates are greater than those between synthetic ethanols and the ethanols obtained from the starch of C₃-plants.
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