Tc NMR determination of the oxygen isotope content in O-enriched water.

Tc NMR has been suggested as an original method of evaluating the content of oxygen isotopes in oxygen-18-enriched water, a precursor for the production of radioisotope fluorine-18 used in positron emission tomography. To this end, solutions of NH TcO or NaTcO (up to 0.28 mol/L) with natural abundance of oxygen isotopes in virgin or recycled O-enriched water have been studied by Tc NMR.