TY JOUR TI NEW SPECTROPHOTOMETRIC METHOD FOR DETERMINING TITANIUM(IV) IN NATURAL OBJECTS KW titanium(IV) KW spectrophotometric method KW complexation KW component JO Vestnik of Astrakhan State Technical University AU Ragimova, A.. AU Mardanova, V.. AU Maharramov, A.. AU Nagiyev, K.. AU Chyragov, F.. PY 2021 IS 2021 PB Astrakhan State Technical University