Simultaneous Multi-element Preconcentration in Aqueous Environmental Samples using Iminodiacetate Extraction Disk(IED) followed by ICP-AES Analysis.

概要

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Simultaneous analysis of Al, Cd, Co, Cu, Fe, Mn, Ni, Pb, and Zn in river waters and wastewaters was accomplished by ICP-AES after a chelate disk Preconcentration. The water sample was digested by HNO3-HClO4, neutralized to pH 5.7±0.1, and then passed through an iminodiacetate extraction disk (IED) . The selected metals, which were quantitatively adsorbed by chelation on the disk were eluted with 3mol/l HNO3 and then determined by ICP-AES. Compared to other separation/preconcentration method such as solvent extraction, the TED method is more recommendable for conventional analysis in view of its large preconcentration factors, good sensitivities, and simplicity in rapid analysis. With a 50-fold preconcentration, this method gives detection limits of 0.024μg·l-1 Al, 0.001μg·l-1 Cd, 0.003μg·l-1 Co, 0.002μg·l-1 Cu, 0.034μg·l-1 Fe, 0.009μg·l-1 Mn, 0.005μg·l-1 Ni, 0.011μg·l-1 Pb, and 0.031μg·l-1 Zn, and determination limits of 0.08μg·l-1 Al, 0.004 μg·l-1 Cd, 0.008μg·l-1 Co and Cu, 0.11μg·l-1 Fe, 0.031μg·l-1 Mn, 0.018μg·l-1 Ni, 0.037μg·l-1 Pb, and 0.10μg·l-1 Zn. These figures are low enough to permit the analysis of aqueous environmental samples. This method provides an adjustable preconcentration factor ranging from 50-250 with satisfying recoveries >90% . Because degree of chelation for metal species varies by their chemical state, it is possible to apply this method to the speciation analysis. It is also suggested that acid digestion is required for the samples containing natural organic chelator when determination of total soluble metals is necessary.
日本環境化学会の論文

Simultaneous Multi-element Preconcentration in Aqueous Environmental Samples using Iminodiacetate Extraction Disk(IED) followed by ICP-AES Analysis.

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概要

日本環境化学会 | 論文

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