INFRARED SPECTRAL ANALYSIS OF THE IONITE BASED ON DIMETHYLOLCARBAMIDE AND ORTHOPHOSPHORIC ACID AND ITS COMPLEX WITH MERCURY (II) ION. JUSR [Internet]. 2025 May 17 [cited 2026 May 18];3(5):131-7. Available from: http://universalpublishings.com/index.php/jusr/article/view/11817