METHOD OF DETERMINING QUANTITATIVE CONTENT OF DEUTERIUM IN WATER AND AQUEOUS SOLUTIONS Russian patent published in 2015 - IPC G01N33/18 G01N24/08 

FIELD: atomic physics.

SUBSTANCE: invention relates to analyses for quantitative determination of the content of the deuterium isotope in various liquids using nuclear magnetic resonance techniques. The method includes exposing an analysed sample to electromagnetic radiation in the radio-frequency range in a constant magnetic field of a nuclear magnetic resonance spectrometer, for which the analysed substance is placed in an ampoule, a reference sample is then inserted into said ampoule, said reference sample being a vacuum-sealed ampoule of a smaller diameter, containing an aqueous solution of a lanthanide shifting agent and water with known deuterium content, after which said ampoule system is placed into the nuclear magnetic resonance spectrometer and the spectrum is recorded on deuterium nuclei, wherein resonance frequency-diverse peaks of the analysed and reference samples are observed; the integral intensity of each peak is then measured; the values are compared and concentration of deuterium in the analysed sample is determined by a proportion method. As the lanthanide shifting agent europium (III) trifluoromethanesulphonate ((Eu(CF₃SO₃)₃) is used, which is capable of inducing paramagnetic chemical shift of the nuclear magnetic resonance signal.

EFFECT: high accuracy and sensitivity, as well as simple and faster analysis.

1 ex, 1 dwg