Synthesis of hydrophilic macroporous chelating polymers and their versatility in the preconcentration of metals in seawater samples [An article from: Analytica Chimica Acta]

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Description:
We systematically synthesized hydrophilic matrix polymers using glycidyl methacrylate (GMA) and ethylene glycol dimethacrylate (EGDMA) by the radical suspension copolymerization method. Methyl iso-butylketone added to the monomer phase as a porogen was effective in the formation of macroporous structures. Triethylenetetramine (TTA) was introduced on the matrix polymers as a chelating moiety (PGMA-EGDMA-TTA), and the adsorption and desorption characteristics of the obtained chelating polymers for several metals were investigated. A better candidate, PGMA-EGDMA-TTA polymer, was packed into a column and the applicability for the preconcentration of metals in seawater samples was tested. A PGMA-EGDMA-TTA possesses the preferable adsorptivity for metals at the seawater pH and a favorable desorption profile using an acid eluent. In addition, a PGMA-EGDMA-TTA-packed column was effective for the preconcentration of metals in the seawater samples.