title: Preparation of open tubular solid-phase extraction column with 5-amino-8-hydroxyquinoline-modified gold nanoparticle phase for the enrichment of heavy metal ions.
abstract: 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 microm. 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.
authors.affiliation: Department of Materials Science and Technology, Graduate School of Science and Technology, Hirosaki University, Hirosaki, Japan. nkt@cc.hirosaki-u.ac.jp
authors.forename: Isoshi
authors.initials: I
authors.lastname: Nukatsuka
authors.forename: Shigeaki
authors.initials: S
authors.lastname: Osanai
authors.forename: Kunio
authors.initials: K
authors.lastname: Ohzeki
mesh_terms: D002104:Cadmium / Q000032:analysis*; D006046:Gold / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D006912:Hydroxyquinolines / Q000737:chemistry*; D007477:Ions / Q000032:analysis; D053768:Metal Nanoparticles / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning / Q000379:methods; D010316:Particle Size; D012680:Sensitivity and Specificity; D012822:Silicon Dioxide / Q000737:chemistry; D052616:Solid Phase Extraction / Q000379:methods*; D012996:Solutions / Q000737:chemistry; D013054:Spectrophotometry, Atomic / Q000379:methods; D013499:Surface Properties
chemical_list: C528550:5-amino-8-hydroxyquinoline; D006912:Hydroxyquinolines; D007477:Ions; D012996:Solutions; D002104:Cadmium; D006046:Gold; D012822:Silicon Dioxide