Use of disposable clean-up columns for selective removal of humic substances prior to measurements with a nitrate ion-selective electrode

✍ Scribed by Istvan Csiky; György Marko-Varga; Jan Åke Jönsson

• Book ID: 104100549
• Publisher: Elsevier Science
• Year: 1985
• Tongue: English
• Weight: 426 KB
• Volume: 178
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/s0003-2670(00)86281-9

✦ Synopsis

Measurements of nitrate in natural waters with a nitrate ion-selective electrode are seriously affected by the presence of humic substances. These can be removed quantitatively by a clean-up procedure with cheap disposable adsorption columns packed with chemically-bonded alkylamino silica. The method is applied to natural water samples with high contents of humic substances. The nitrate concentrations found were in good agreement with determinations by ion chromatography.