Potassium hydroxide eluent for nonsuppressed anion chromatography of cyanide, sulfide, arsenite, and other weak acids

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00281a013· OSTI ID:5651470

Okada, T; Kuwamoto, T

Potassium hydroxide solution was found to be an effective eluent for nonsuppressed anion chromatography. Polyvalent ions, SCN/sup -/, and ClO/sub 4//sup -/, which are strongly retained by an anion-exchange resin, could not be quantitatively measured, because potassium hydroxide was too weak an eluent. However, this method was applicable to the determination of 15 inorganic monovalent anions (F/sup -/, Cl/sup -/, ClO/sub 3//sup -/, Br/sup -/, BrO/sub 3//sup -/, I..sqrt.., IO/sub 3//sup -/, NO/sub 3//sup -/, NO/sub 2//sup -/, CN/sup -/, HS/sup -/, CNO/sup -/, BF/sub 4//sup -/, silicate, arsenite). The main advantage is that weak acids of pK/sub a/ > 7 (cyanide, sulfide, arsenite, silicate, and phenol compounds) which cannot be detected by conventional ion chromatography using a conductivity detector can be determined by this method. The detection limits for cyanide, sulfide, and arsenite were 0.1 ppm, 0.1 ppm, and 0.2 ppm (as As), respectively.

• Research Organization: Kyoto Univ., Japan
• OSTI ID: 5651470
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 57:4; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
400105 -- Separation Procedures
ALKALI METAL COMPOUNDS
ANIONS
ARSENIC COMPOUNDS
ARSENIDES
BORON COMPOUNDS
BROMATES
BROMIDES
BROMINE COMPOUNDS
CARBONIC ACID DERIVATIVES
CHALCOGENIDES
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHLORATES
CHLORIDES
CHLORINE COMPOUNDS
CHROMATOGRAPHY
CYANATES
CYANIDES
DATA
DISPERSIONS
ELUTRIATION
EXPERIMENTAL DATA
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
IODATES
IODIDES
IODINE COMPOUNDS
ION EXCHANGE CHROMATOGRAPHY
ION EXCHANGE MATERIALS
IONS
MATERIALS
MIXTURES
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PERFORMANCE
PETROCHEMICALS
PETROLEUM PRODUCTS
PNICTIDES
POLYMERS
POTASSIUM COMPOUNDS
POTASSIUM HYDROXIDES
QUANTITATIVE CHEMICAL ANALYSIS
RESINS
SEPARATION PROCESSES
SILICATES
SILICON COMPOUNDS
SOLUTIONS
SOLVENT PROPERTIES
SULFIDES
SULFUR COMPOUNDS
TRACE AMOUNTS