Ischenko M. The combined spectroscopic methods of Pb (II), Cd (II), Cu (II), Co (II), Ni (II) determination with loaded onto silica gel sulfarsazene and brombenzthiazo

The dissertation is devoted to the elaboration of solid-phase reagents on the base of sulfarsazene and brombenzthiazo immobilized on silica and the investigation of their heterophase reactions with heavy metal ions. Conditions of sulfarsazene immobilization in the form of its ion associate with quaternary ammonium salts were optimized. On the base of sulfarsazene immobilized were developed a method of sorption-atomic-absorption determination of Pb (II) and Cd(II) in natural waters, and also a solid-phase spectrophotometric method of Cd (II)determination. Conditions of brombenzthiazo immobilization onto silica gel from different solvents were optimized. The nature of solid-phase brombenzthiazo interaction with heavy metals ions was investigated and optimum conditions their solid-phase extraction were determined. On a basis of immobilized brombenzthiazo sorption-atomic-absorption method of the determination of Cd(II), Cu(II), Co(II), Ni(II), solid-phase spectrophotometric and visual test - method of Cd (II) determination in natural waters and food salt are proposed.