Selective concentration of cobalt in seawater by complexation with various ligands and sorption on macroporous resins

Journal Article · Thu Jan 15 04:00:00 EST 1987 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00129a015· OSTI ID:6922377

Isshiki, K; Nakayama, E

Selective concentration of trace amounts of cobalt in seawater was examined by use of 14 ligands and 2 XAD resins. Complexed cobalt was collected after passage through a small XAD resin packed column. Complexes of coexisting metals were eluted with acidic solution. Cobalt complex was then eluted with a methanol-chloroform mixture. When ligands insoluble in water were used, the recovery of cobalt was not quantitative because of coprecipitation of the complex on the precipitated ligands. The combination of TAR, which forms a water-soluble inert complex with cobalt, and XAD-4 resin was preferable for the selective concentration of cobalt in seawater. This method was applied to the preconcentration of cobalt dissolved in seawater at nanogram-per-liter levels.

• Research Organization: Kyoto Univ., Japan
• OSTI ID: 6922377
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 59:2; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
COBALT
COMPLEXES
DATA
ELEMENTS
EXPERIMENTAL DATA
HYDROGEN COMPOUNDS
INFORMATION
LIGANDS
MATERIALS
METALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
POROUS MATERIALS
RESINS
SEAWATER
SORPTION
TRACE AMOUNTS
TRANSITION ELEMENTS
WATER