title: Determination of divalent trace metals in natural waters by preconcentration on N,N,N',N'-tetra(2-aminoethyl)ethylenediamine-silica followed by on-line ion chromatography.
abstract: A method for the on-line preconcentration and chromatography of trace metals, e.g., Co, Ni, Cu, Zn, Cd and Pb, on N,N,N',N'-tetra(2-aminoethyl)ethylenediamine-bonded silica is described. The preconcentrated metals were desorbed with 0.13 M tartrate, which allows direct separation on a cation-exchange chromatographic column. The metals separated were detected by postcolumn reaction with 4-(2-pyridylazo)resorcinol and measuring the absorbances at 500 nm. Linear calibration graphs were obtained over the range 1.10(-8)-3.10(-6) M. The synthesis and characteristics of the chelated silica are described. The method was applied to the analysis of river and interstitial sediment waters.
authors.affiliation: Département de Chimie Analytique, Université de Genève, Switzerland.
authors.forename: D
authors.initials: D
authors.lastname: Chambaz
authors.forename: W
authors.initials: W
authors.lastname: Haerdi
mesh_terms: D002021:Buffers; D002413:Cations, Divalent; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002852:Chromatography, Ion Exchange; D005029:Ethylenediamines; D007477:Ions; D008670:Metals / Q000032:analysis*; D012822:Silicon Dioxide; D013056:Spectrophotometry, Ultraviolet; D014131:Trace Elements / Q000032:analysis*; D014867:Water / Q000737:chemistry*
chemical_list: D002021:Buffers; D002413:Cations, Divalent; D005029:Ethylenediamines; D007477:Ions; D008670:Metals; C076940:N,N,N',N-tetra(2-aminoethyl)ethylenediamine-bonded silica; D014131:Trace Elements; D014867:Water; D012822:Silicon Dioxide