Comparison of two methods for measuring ammonium in solution samples
- 1 July 1989
- journal article
- research article
- Published by Taylor & Francis in Communications in Soil Science and Plant Analysis
- Vol. 20 (11-12) , 1131-1144
- https://doi.org/10.1080/00103629009368141
Abstract
The measurement of NH4-N in terrestrial and aquatic solutions by the commonly used automated indophenol-blue method was compared to a new technique based on the conductimetric measurment of NH3. Average precision (2 times relative standard deviation) was 5.3% and 7.0% for the Ammonia-Analyzer and Auto-Analyzer, respectively. Average accuracy as determined from spike measurements was not statistically different between the Ammonia-Analyzer (99.5%) and Auto-Analyzer (96.2%). Although both methods predicted similar concentrations on the same sample set, the Ammonia-Analyzer provides an alternative to NH4-N measurement with fewer required reagents, and simpler instrumentation.This publication has 8 references indexed in Scilit:
- Importance of biological processes in the sulfur budget of a northern hardwood ecosystemBiology and Fertility of Soils, 1987
- Automated Analysis of Nitrite, Nitrate, and Ammonium Nitrogen in SoilsSoil Science Society of America Journal, 1985
- Single Column Ion Chromatography: II. Analysis of Ammonium, Alkali Metals, and Alkaline Earth Cations in SoilsSoil Science Society of America Journal, 1985
- Atmospheric Deposition and Ionic Movement in Adirondack ForestsPublished by Springer Nature ,1985
- Aluminum speciation and equilibria in soil solutions of a Haplorthod in the Adirondack Mountains (New York, U.S.A.)Geoderma, 1984
- Direct Colorimetric Measurement of Ammonium in Potassium Chloride Extracts of SoilsSoil Science Society of America Journal, 1983
- Automated separation and conductimetric determination of ammonia and dissolved carbon dioxideAnalytical Chemistry, 1978
- Phenol-hypochlorite reaction for determination of ammoniaAnalytical Chemistry, 1967