Determination of the concentrations of 2H natural levels in liquid media using NMR spectroscopy

The results of approbation of the method for the quantitative determination of 2H by NMR spectroscopy using a lanthanide shifting reagent added to the probe as an external NMR standard against which the measurement is performed are presented. In the course of the studies, it was confirmed that europium (III) trifluoromethanesulfonate is the most suitable chemical compound for creating a reference sample. It was found that the highest content of deuterium was in the juice of the Argentine pear (144.6 ± 2.3 ppm), the lowest concentration of deuterium was found in the russian and egyptian potato juices (≈100 ppm).