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.
Acknowledgment
One of the authors, C. R. Preetha is thankful to Council of Scientific and Industrial Research (CSIR), New Delhi (India) for the award of Junior Research Fellowship (JRF).