Simultaneous determination of arsenic(III) and arsenic(V) in metallurgical processing media by ion chromatography with electrochemical and conductivity detectors

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00298a026· OSTI ID:5498178

Dutrizac, J E

As(III) and As(V) in metallurgical processing solutions are determined simultaneously by ion chromatography with electrochemical and conductivity detectors, respectively. The effects of acid, base, or alkali salts on the ion chromatograms obtained from low concentrations of As(III) are described. Cations such as Co(II), CU(II), Fe(II and III), and Ni(II) must be preseparated with an H/sup +/ cation exchanger to avoid precipitation of arsenic with the metal hydroxides formed during dilution. Na/sup +/ or K/sup +/ in the sample must be preseparated similarly because of their effects on the current response of the arsenite. The effect of H/sub 2/SO/sub 4/ on the current sensitivity of the arsenite was determined. The detection limits for arsenite in 0 and 5 mM H/sub 2/SO/sub 4/ are 0.005 and 0.025 mg/L As(III), respectively. The detection limit for arsenate is 0.022 mg/L As(V). As(III)/As(V) ratios as low as 0.025 can be determined quantitatively. 23 references, 7 figures, 4 tables.

• Research Organization: Energy, Mines and Resources Canada, Ottawa, Ontario
• OSTI ID: 5498178
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:7; 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
400400 -- Electrochemistry
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALI METALS
ARSENIC
CATIONS
CHARGED PARTICLES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COBALT
COPPER
DATA
DISPERSIONS
ELEMENTS
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
INORGANIC ACIDS
ION EXCHANGE CHROMATOGRAPHY
IONS
IRON
LIQUID WASTES
METALS
MIXTURES
NICKEL
NUMERICAL DATA
ORE PROCESSING
PH VALUE
POTASSIUM
PRECIPITATION
PROCESSING
QUANTITATIVE CHEMICAL ANALYSIS
SEMIMETALS
SEPARATION PROCESSES
SODIUM
SOLUTIONS
SULFURIC ACID
TRACE AMOUNTS
TRANSITION ELEMENTS
VALENCE
WASTES