FIELD: analytical methods. SUBSTANCE: small amounts of Cu, Fe, and Zn are determined from water after concentration. Method involves use of sorbents, washing out of adsorbed ions with eluent and determination thereof by atomic absorption technique. According to invention, polystyrene/azochromotropic acid is used as sorbent and 6M HCl as eluent. EFFECT: enabled creation of effective movable phases for joint recovery of metal ions and new type of heterogeneous catalysts. 2 tbl
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