title: Determination of gallium at trace levels using a spectrofluorimetric method in synthetic U-Ga and Ga-As solutions.
abstract: A simple, easy to use and selective spectrofluorimetric method for the determination of trace levels of gallium has been developed. A new Schiff base, N-o-vanillidine-2-amino-p-cresol (OVAC) was synthesized and its fluorescence activity with gallium investigated. Based on this chelation reaction, a spectrofluorimetric method has been developed for the determination of gallium in synthetically prepared Ga-U and Ga-As samples buffered at pH 4.0 using acetic acid-sodium acetate. The chelation reaction between Ga(III) and N-o-vanillidine-2-amino-p-cresol was very fast, requiring only 30min at room temperature to complex completely. The limit of detection (LOD) (3sigma) for Ga(III) was 7.17 nM (0.50 microgL(-1)), determined from the analysis of 11 different solutions of 20 microg L(-1) Ga(III).
authors: Department of Chemistry, Art and Science Faculty, Balikesir University, Balikesir, Turkey. dkara@balikesir.edu.tr
authors: Derya
authors: D
authors: Kara
authors: Andrew
authors: A
authors: Fisher
authors: Mike
authors: M
authors: Foulkes
authors: Steve J
authors: SJ
authors: Hill
mesh_terms: D001151:Arsenic / Q000737:chemistry*; D001547:Benzaldehydes / Q000737:chemistry; D002614:Chelating Agents / Q000737:chemistry; D003408:Cresols / Q000737:chemistry; D005708:Gallium / Q000032:analysis*; D006863:Hydrogen-Ion Concentration; D057230:Limit of Detection; D012545:Schiff Bases / Q000737:chemistry; D012996:Solutions / Q000032:analysis*; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000295:instrumentation / Q000379:methods*; D014501:Uranium / Q000737:chemistry*
chemical_list: D001547:Benzaldehydes; D002614:Chelating Agents; D003408:Cresols; C525672:N-o-vanillidine-2-amino-p-cresol; D012545:Schiff Bases; D012996:Solutions; D012997:Solvents; D014501:Uranium; D005708:Gallium; D001151:Arsenic