Indirect determination of cyanide by single-column ion chromatography
Journal Article
·
· Anal. Chem.; (United States)
The procedure was developed by modification of a pneumoamperometric method which uses the reaction of cyanide with iodine, since the final concentration of iodide is proportional to the initial concentration of cyanide. The sample is diluted so that the cyanide concentration is in the range of .5 - 10 ppm, acetate buffer is added to adjust the pH to a value between 4.5 and 6. Excess iodine is added in 95% ethanol, sample is diluted to constant volume and allowed to stand for ca 5 min. Small aliquots of sample are injected slowly into the ion chromatograph through a precolumn containing XAD-4 resin. The excess iodine is adsorbed on this precolumn. The ion chromatograph adsorbs the iodide reaction product on XAD-1 resin. The iodide is removed by elution with sodium phthalate. Retention time is ca 5 min. Contamination of the system may be prevented by the removal of the precolumn for iodine desorption using nitric acid in acetone and water. 2 figures, 3 tables.
- Research Organization:
- Iowa State Univ., Ames
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6898999
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Journal Issue: 4 Vol. 54:4; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
ACETATES
ACETONE
ALCOHOLS
ANIONS
AQUEOUS SOLUTIONS
CALIBRATION
CARBOXYLIC ACID SALTS
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CYANIDES
DATA
DATA ANALYSIS
DISPERSIONS
ELEMENTS
ETHANOL
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
HALOGENS
HYDROCYANIC ACID
HYDROGEN
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ACIDS
IODIDES
IODINE
IODINE COMPOUNDS
ION EXCHANGE
ION EXCHANGE MATERIALS
IONS
KETONES
MATERIALS
MIXTURES
NITRIC ACID
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PH VALUE
PHTHALATES
PHYSICAL PROPERTIES
POLYMERS
QUANTITATIVE CHEMICAL ANALYSIS
RESINS
SOLUTIONS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
TIME DEPENDENCE
TRACE AMOUNTS
YIELDS
400105* -- Separation Procedures
ACETATES
ACETONE
ALCOHOLS
ANIONS
AQUEOUS SOLUTIONS
CALIBRATION
CARBOXYLIC ACID SALTS
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CYANIDES
DATA
DATA ANALYSIS
DISPERSIONS
ELEMENTS
ETHANOL
EXPERIMENTAL DATA
HALIDES
HALOGEN COMPOUNDS
HALOGENS
HYDROCYANIC ACID
HYDROGEN
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INFORMATION
INORGANIC ACIDS
IODIDES
IODINE
IODINE COMPOUNDS
ION EXCHANGE
ION EXCHANGE MATERIALS
IONS
KETONES
MATERIALS
MIXTURES
NITRIC ACID
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PH VALUE
PHTHALATES
PHYSICAL PROPERTIES
POLYMERS
QUANTITATIVE CHEMICAL ANALYSIS
RESINS
SOLUTIONS
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
TIME DEPENDENCE
TRACE AMOUNTS
YIELDS