FIELD: analytical chemistry. SUBSTANCE: invention relates to indicator compositions and can be used for determination of rhenium (VII) in aqueous solutions, in particular, in sewage waters and industrial solutions. Indicator composition for determination of rhenium (VII) in aqueous solutions comprises anion-exchange resin AV-17-10P as sorbent, brilliant green, phosphoric acid and water in the following ratio of components, wt.-%: anion-exchange resin AV-17-10P, 0.40; brilliant green, 0.004; phosphoric acid, 1.57; water, the balance. Invention provides enhancing sensitivity and approximate analysis of rhenium (VII) and improved selectivity of procedure. EFFECT: improved assay method. 2 tbl
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