[Analysis of highly tritium-labeled alanine using 3H- and 1H-NMR]. / Analiz vysokomechennogo tritiem alanina s pomoshch'iu 3H- i 1H-IaMR.

A method has been developed for the analysis of deuterium oxide solutions of tritiated alanine eight-component isotopic mixtures by using high resolution 3H and 1H NMR spectra at frequencies 266.8 and 500.13 MHc, respectively. Approaches have been worked out for the determination of qualitative composition of the mixtures and spectral parameters.

[Analysis of tritium-labeled glycine and alanine using 3H-NMR]. / Analiz mechennykh tritiem glitsina i alanina s pomoshch'iu 3H-IaMR.

A method for analysis of three-component isotopic mixtures of tritium-labelled glycine and alanine in D2O solutions has been developed on the basis of high resolution 3H NMR spectra at 266.8 MHz. Determined were composition of the mixtures in molar per cent, as well as geminal and vicinal coupling constants (2JGly3H,H = -16.4 +/- 0.2 Hz; 2JAla3H,H = -14.0 +/- 0.5 Hz; 3JAla3H,H = 7.6 +/- 0.2 Hz) and isotopic shifts (0.21 +/- 0.001 ppm for glycine; 0.026 +/- 0.001 ppm for alanine).