Naphthols as Reagents for Solid‐Phase Preconcentrative Separation of Inorganics

Abstract

Solid phase extraction (SPE) has emerged as a powerful tool for separation/enrichment of inorganics, organics and biomolecules. The basic principle of SPE is the transfer of analytes from aqueous phase to the active sites of adjacent solid phase. The solid phase materials were prepared by sorption/chemical immobilization/coprecipitation of various chelating reagents or sorption of metal‐chelating agents onto solid supports such as activated carbon, naphthalene, silica and silica gel, glassbeads, cellulose, polyurethane foam and polymer supports. This review highlights the salient features of SPE preconcentrative separation procedures developed so far for inorganics wherein naphthols are used as chelating reagents and evaluates them critically.