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Issue 5, 2003
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High temporal resolution monitoring of inorganic nitrogen load in drainage waters

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Abstract

Nitrate (NO3), ammonium (NH4+) and pH were monitored with a novel flow cell equipped with ion-selective electrodes (ISEs) in a drainage pipe during one year. The high temporal resolution of the measurements (six measurements per hour) allowed the detection of diurnal oscillations in pH, NO3 and NH4+ concentrations, the relation of variations in concentrations to discharge rates changing during rain events, understanding of the processes resulting in such variations and tracing of unpredictable manure spills. Annual loads estimated from random samples collected every second day tended to underestimate the “true” loads calculated from quasi-continuous electrode measurements by 550% for NH4+ and 22% for NO3.

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Publication details

The article was received on 09 May 2003, accepted on 27 Jun 2003 and first published on 31 Jul 2003


Article type: Paper
DOI: 10.1039/B305206K
Citation: J. Environ. Monit., 2003,5, 808-812
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    High temporal resolution monitoring of inorganic nitrogen load in drainage waters

    B. Müller, M. Reinhardt and R. Gächter, J. Environ. Monit., 2003, 5, 808
    DOI: 10.1039/B305206K

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