Abstract
An inexpensive external unit that allows the use of the commercial high-resolution NMR spectrometer for 2H observation with an 1H lock system is described. The external unit does not require any tuning, is extremely easy to use, and could be a cheaper and more straightforward alternative to the more expensive 19F lock configuration. An application for the quantitative determination of the natural isotopic ratio 2H/ 1H of ethanol and acetic acid is reported.
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