Automated two-column ion exchange system for determination of the speciation of trace metals in natural waters

Journal Article · Wed Mar 15 04:00:00 EST 1989 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00181a005· OSTI ID:5880249

Liu, Y; Ingle, Jr, J D

A rapid method for determination of metal speciation based on an automated two-column ion exchange system is described. Two fractions of dissolved trace metal species are directly determined by on-line flame atomic absorption spectrophotometry after preconcentration by sequential columns of Chelex-100 chelating resin and AG MP-1 macroporous anion resin. A third fraction is determined by standard addition. Variables that affect the results obtained by the two-column system are studied by the use of model complexing agents. With a 10-mL sample loop, the sample throughput is 6 samples per hour and detection limits are 0.1 micrograms/L for Cu(II), 0.08 micrograms/L for Cd(II), and 0.2 micrograms/L for Zn(II). The method is used to determine the speciation of Cu(II), Cd(II), and Zn(II) in natural water samples.

• OSTI ID: 5880249
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 61:6; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ABSORPTION SPECTROSCOPY
CADMIUM
CHROMATOGRAPHY
COPPER
ECOLOGICAL CONCENTRATION
ELEMENTS
ION EXCHANGE CHROMATOGRAPHY
METALS
POLLUTION
SEPARATION PROCESSES
SPECTROSCOPY
TRACE AMOUNTS
TRANSITION ELEMENTS
WATER POLLUTION
ZINC