METHOD FOR DETERMINING TRACE AMOUNTS OF NITRATE-IONS IN CHLORIDE STRONTIUM Russian patent published in 2018 - IPC G01N24/10 

FIELD: chemistry.

SUBSTANCE: invention relates to the field of analytical chemistry and can be used in radiopharmaceuticals manufacturing, in dentistry and cosmetology. Method for determination of trace amounts of nitrate ions in the SrCl₂ salt characterized in that from the initial strontium chloride, a macrocyclic complex of the CE⋅SrCl₂, where CE is a molecule of crown ether; irradiate the macrocyclic complex CE⋅SrCl₂ at a liquid nitrogen temperature of 77 K in order to form and stabilize radical products of radiolysis, with the macrocyclic complex CE⋅SrCl₂ previously evacuated in a glass ampoule; register the EPR spectrum of radical radiolysis products stabilized in the irradiated macrocyclic complex CE⋅SrCl₂, at a temperature in the range of 77–110 K, the concentration of dianionic NO₃^2- in the parent salt of SrCl₂.

EFFECT: method for determining trace amounts of nitrate ions in strontium chloride is proposed.

4 cl, 1 dwg, 6 ex