00607naa#a2200205#i#450# EN\\bibl\114162 20260204194736.3 3034-4689 20260131b2026####ek#y0engy0150####ca RU MATHEMATICAL ANALYSIS OF THE FORM OF IMPURITY AND REACTION MECHANISM IN THE CHEMICAL PURIFICATION PROCESS Journal article Kazan Kazan National Research Technological University 2026 4 с. Journal article local Tatarniceva E. V. Levin Yu. I. vestniktu.ru