Direct measurement of nutrient concentrations in freshwaters with a miniaturized analytical probe: evaluation and validation

作者：Copetti I^*; Valsecchi L; Capodaglio A G; Tartari G

来源：Environmental Monitoring and Assessment, 2017, 189(4): 144.

DOI：10.1007/s10661-017-5847-0

• Field measurement
• Nutrients
• Total phosphorus
• Water pollution
• Miniaturized probe

This work deals with the evaluation of the aqueous concentrations of dissolved reactive phosphorus (DRP), total phosphorus (TP), and ammonium nitrogen (N-NH4) in surface water by means of direct online instrumentation. A portable, submersible, and automated analyzer designed to measure dissolved and total nutrient concentrations characterized by miniaturization of the entire analytical process was tested against laboratory methods. A total number of 36 water samples of different origin (i.e., rain, river, lake, and sewage waters) were analyzed and used in the comparison of DRP, TP, and N-NH4 data. Raw data were distributed in a broad range of concentrations: 5-299 mu g P/L for DRP, 7-97 mu g P/L for TP, and 11-332 mu g N/L for N-NH4. Regression analysis underlined a high significant correlation between the measures of the probe and those of the laboratory (0.6 < R-2 < 0.9; p < 0.001) and pointed out the effectiveness of the new instrument in representing a broad range of nutrient concentrations.

• 出版日期2017-4