AbstractThe resacetophenone‐formaldehyde (RAP‐F) resin showed to be a selective chelating ion‐exchange resin for certain metal ions. A batch equilibration method was used in the study of the selectivity of metal ion uptake. The method involved the measurement of distribution of a given metal ion between an aqueous solution and the resin. The study was carried out over a wide pH range and in media of various ionic stre