FIELD: chemistry.
SUBSTANCE: invention relates to analytical chemistry and specifically to a method for luminescent determination of terbium. The method involves converting terbium into a luminescent compound with an organic reagent. The reagent used is 1,2-dioxybenzene-3,5-disulphonic acid (DBSA) and ethylenediaminetetraacetic acid (EDTA) is added to the solution of the luminescent complex of terbium with DBSA in ratio Tb:DBSA:EDTA=1:1:1 at pH=12.0-13.0.
EFFECT: invention increases sensitivity, selectivity and accuracy of analysis.
1 ex
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