Organic carbon causes interference with nitrate and nitrite measurements by UV/Vis spectrometers: the importance of local calibration

• Published in: Environmental monitoring and assessment Vol. 189; no. 7; p. 357
• Main Authors: Uusheimo, Sari, Tulonen, Tiina, Arvola, Lauri, Arola, Hanna, Linjama, Jarmo, Huttula, Timo
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 01.07.2017; Springer Nature B.V
• Subjects: Aquatic plants; Atmospheric Protection/Air Quality Control/Air Pollution; Calibration; Carbon; Carbon - analysis; Dissolved organic carbon; Earth and Environmental Science; Ecology; Ecotoxicology; Environment; Environmental Management; Environmental monitoring; Environmental Monitoring - methods; Environmental science; Error correction; Error detection; Fresh water; Fresh Water - analysis; freshwater; Incident light; Interference; lakes; Monitoring/Environmental Analysis; Nitrates; Nitrates - analysis; Nitrites; Nitrites - analysis; Nitrogen Oxides - analysis; Optical measuring instruments; Organic carbon; Photometry; Regression analysis; Rivers; Sensors; Spectrometers; streams; surface water; Transmittance; Water - analysis; Water Pollutants, Chemical - analysis; Water quality; Water quality monitoring; Water sampling; wavelengths; Optical measurement; Organic carbon; High-frequency sensor; Nitrate; Calibration; Boreal water monitoring

Compared with sporadic conventional water sampling, continuous water-quality monitoring with optical sensors has improved our understanding of freshwater dynamics. The basic principle in photometric measurements is the incident light at a given wavelength that is either reflected, scattered, or tran...