Ion chromatographic determination of nitrate and sulfate in natural waters containing humic substances

Journal Article · Mon Oct 01 04:00:00 EDT 1984 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00276a020· OSTI ID:5371278

Marco-Varga, G; Csiky, I; Jonsson, J A

In the study of the pollution of natural waters, the concentrations of nitrate and sulfate are important factors. The analytical methods use for nitrates and sulfates are to varying extents influenced by the presence of humic substances in natural waters. Determinations of anions in natural waters by various methods, including ion chromatography, are disturbed by the inevitable presence of humic substances. A cleanup column, packed with chemically bonded amine material for HPLC, is useful for the selective removal of disturbing humic substances prior to anion analysis by ion chromatography. For all the development work described, the same separation column is used. No change was noted in color of the resin nor any deterioration of the chromatographic properties after more than 500 injections and thus it was concluded that the separation column was effectively protected from the disturbing fraction of humic acid. A technique similar to the one described probably can be used to discriminate metal ions associated with humic substances from free metal ions. 14 references, 2 figures, 3 tables.

• Research Organization: Lund Univ., Sweden
• OSTI ID: 5371278
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 56:12; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

520200* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHROMATOGRAPHY
ECOLOGICAL CONCENTRATION
HUMIC ACIDS
MEASURING METHODS
NITRATES
NITROGEN COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
REMOVAL
SEPARATION PROCESSES
SULFATES
SULFUR COMPOUNDS
SURFACE WATERS