Precolumn chelation with 4-(2-pyridylazo)resorcinol for simultaneous determination of metal ions by liquid chromatography
The present study constitutes a preliminary evaluation of the use of 4-(2-pyridylazo)resorcinol (PAR) as a precolumn chelating agent for liquid chromatographic multielement determinations. A conventional reversed-phase liquid chromatographic system has been used. Fixed-wavelength UV absorption and oxidative thin-layer amperometry have been employed for detection of PAR chelates. Areas examined include response linearity and detection limits. Liquid chromatographic separation of PAR chelates as an approach to multielement analysis of natural water samples has been evaluated. Preliminary investigation has shown that the determination of metal ions such as Cu/sup 2 +/, Co/sup 2 +/, Ni/sup 2 +/, and Fe/sup 2 +/ as PAR chelates at the parts-per-billion level is feasible. 20 references, 2 figures, 2 tables.
- Research Organization:
- Northern Illinois Univ., DeKalb
- OSTI ID:
- 6465114
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 56:2; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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54 ENVIRONMENTAL SCIENCES
AMPEROMETRY
AROMATICS
AZINES
CATIONS
CHARGED PARTICLES
CHELATING AGENTS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COBALT
COPPER
DATA
DIAZO COMPOUNDS
ELEMENTS
EXPERIMENTAL DATA
FRESH WATER
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
IONS
IRON
LIQUID COLUMN CHROMATOGRAPHY
METALS
NICKEL
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
PHENOLS
POLYPHENOLS
PYRIDINES
PYRIDYLAZORESORCINOL
QUANTITATIVE CHEMICAL ANALYSIS
REAGENTS
SEPARATION PROCESSES
SPECTRA
TITRATION
TRANSITION ELEMENTS
ULTRAVIOLET SPECTRA
WATER