title: Analysis for chromium traces in natural waters. I. Preconcentration of chromate from P.P.B. levels in aqueous solutions by ion exchange.
mesh_terms: D002840:Chromates / Q000032:analysis*; D007475:Ion Exchange Resins; D008722:Methods; D008832:Microchemistry; D012996:Solutions / Q000032:analysis; D014131:Trace Elements / Q000032:analysis; D014876:Water Pollution / Q000032:analysis*
chemical_list: D002840:Chromates; D007475:Ion Exchange Resins; D012996:Solutions; D014131:Trace Elements