TY JOUR TI RESEARCH OF THE POSSIBILITY OF THE SYSTEM COBALT – PHTHALEXON SA APPLICATION AS REAGENT ON SODIUM CAFFEINE-BENZOAT KW ium caffeine-benzoate KW phthalexone SA KW cobalt ions KW identification KW quantification KW spectrophotometry JO CASPIANJOURNALOF MEDICINE AND PHARMACY AU Mazhitova, M.V. AU Azatyan, S.. AU Ocheredko, Y.A. AU Karibyants, M.A. PY 2023 IS 4 PB Astrakhan State Medical University