Liquid chromatographic separation and indirect detection of organic acids using iron(II) 1,10-phenanthroline as a mobile-phase additive
Journal Article
·
· Anal. Chem.; (United States)
Iron(II) 1,10-phenanthroline (Fe(phen)/sub 3//sup 2 +/ salts are used as mobile-phase additives for the liquid chromatographic separation of organic acids as anionic analytes on a reverse stationary phase. Major elution variables that affect selectivity and resolution are Fe(phen)/sub 3//sup 2 +/ concentration and its retention on the stationary phase, type and concentration of counter-anions, pH, buffer components and concentration, ionic strength, organic modifier, and analyte anion selectivity. Indirect detection is used to detect nonabsorbing organic analyte anions by monitoring the effluent at 510 nm where Fe-(phen)/sub 3//sup 2 +/ exhibits maximum absorbance. Separations of multicomponent mixtures of alkylsulfonic, mono- and diprotic alkyl carboxylic, and and aromatic carboxylic acids are shown. Detection limits, depending on analyte and conditions, approach 20 ng. A linear detector response was found for analyte anion (propionate and lactate) concentrations from 20 ng to over 10,000 ng of injected analyte.
- Research Organization:
- Univ. of Iowa, Iowa City
- OSTI ID:
- 6803547
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 59:10; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400105* -- Separation Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADDITIVES
ANIONS
AROMATICS
AZAARENES
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DATA
ELUTRIATION
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
IONS
IRON COMPOUNDS
LIQUID COLUMN CHROMATOGRAPHY
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PERFORMANCE
PH VALUE
PHENANTHROLINES
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
RESOLUTION
SALTS
SEPARATION PROCESSES
TRACE AMOUNTS
TRANSITION ELEMENT COMPOUNDS
400102 -- Chemical & Spectral Procedures
400105* -- Separation Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADDITIVES
ANIONS
AROMATICS
AZAARENES
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DATA
ELUTRIATION
EXPERIMENTAL DATA
HETEROCYCLIC COMPOUNDS
INFORMATION
IONS
IRON COMPOUNDS
LIQUID COLUMN CHROMATOGRAPHY
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PERFORMANCE
PH VALUE
PHENANTHROLINES
QUANTITATIVE CHEMICAL ANALYSIS
QUANTITY RATIO
RESOLUTION
SALTS
SEPARATION PROCESSES
TRACE AMOUNTS
TRANSITION ELEMENT COMPOUNDS