Abstract − Analytical Sciences, 24(2), 267 (2008).
Preparation of Open Tubular Solid-Phase Extraction Column with 5-Amino-8-hydroxyquinoline-modified Gold Nanoparticle Phase for the Enrichment of Heavy Metal Ions
Isoshi NUKATSUKA, Shigeaki OSANAI, and Kunio OHZEKI
Department of Materials Science and Technology, Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan
A 5-amino-8-hydroxyquinoline (AHQ)-modified gold nanoparticle (GNP) layer was fabricated on an inner wall of a silica capillary column by alternatively passing a citrate-stabilized GNP solution and an AHQ solution in a repeating fashion. The observations by a field emission scanning electron microscope showed that the thickness of the resulting GNP layer was about 0.15 µm. This column was then used as an open tubular solid-phase extraction column for cadmium, followed by electrothermal atomic absorption spectrometric determination. The detection limit of 0.009 ng ml-1 was obtained.
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