Potential of carboxymethylated polyallylamine as a functional group on chelating resin for solid-phase extraction of trace elements

New chelating resins immobilizing carboxymethylated polyallylamine (CM-PAA) were prepared by immobilizing PAAs with some molecular weights on methaerylate resins and then earboxymethylating a part of amino groups in the PAAs using various amounts of sodium monoehloroacetate. The molecular weight of PA A barely affected both the amount of PAA immobilized on the resin and the relationship between the carboxymethylation (CM) rate and the ratio of the amount of monoehloroacetate used in the CM step. The selectivity of CM-PAA resin for solid-phase extraction of trace elements was almost the same as that of a resin immobilizing carboxylymethylated polyethyieneimine; 10 elements, namely Cd. Co, Cu, Fe, Mo, Ni. Pb, Ti, V, and Zn. could be quantitatively recovered over a wide pH range and alkali and alkaline earth elements were scarcely extracted under acidic and neutral conditions. The CM-PAA resin was applicable to the separation and preconcenlration of the elements in a certified reference material (Waste Water, EU-L-I) and a real environmental water sample (ground water).