Monitoring of Ammonium and Nitrate Ions in Soil Using Ion-Sensitive Potentiometric Microsensors - LAAS - Laboratoire d'Analyse et d'Architecture des Systèmes
Article Dans Une Revue Sensors Année : 2024

Monitoring of Ammonium and Nitrate Ions in Soil Using Ion-Sensitive Potentiometric Microsensors

Maurane Marlet
  • Fonction : Auteur
David Barreau
  • Fonction : Auteur
Arnaud Jourdan
  • Fonction : Auteur
Céline Durieu
  • Fonction : Auteur
Jérôme Launay
Pierre Temple-Boyer

Résumé

Focusing on the ChemFET (chemical field-effect transistor) technology, the development of a multi-microsensor platform for soil analysis is described in this work. Thus, different FET-based microdevices (i.e., pH-ChemFET pNH4-ISFET and pNO3-ISFET sensors) were realized with the aim of monitoring nitrogen-based ionic species in soil, evidencing quasi-Nernstian detection properties (>50 mV/decade) in appropriate concentration ranges for agricultural applications. Using a specific test bench adapted to important earth samples (mass: ~50 kg), first experiments were done in a lab, mimicking rainy periods as well as nitrogen-based fertilizer inputs. By monitoring pH, pNH4, and pNO3 in an acidic (pH ≈ 4.7) clay-silt soil matrix, different processes associated to the nitrogen cycle were characterized over a fortnight, demonstrating comprehensive results for ammonium nitrate NH4NO3 inputs at different concentrations, water additions, nitrification phenomena, and ammonium NH4+ ion trapping. Even if the ChemFET-based measurement system should be improved according to the soil(electrolyte)/sensor contact, such realizations and results show the ChemFET technology potentials for long-term analysis in soil, paving the way for future “in situ” approaches in the frame of modern farming.
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Dates et versions

hal-04780151 , version 1 (13-11-2024)

Identifiants

Citer

Matthieu Joly, Maurane Marlet, David Barreau, Arnaud Jourdan, Céline Durieu, et al.. Monitoring of Ammonium and Nitrate Ions in Soil Using Ion-Sensitive Potentiometric Microsensors. Sensors, 2024, 24 (22), pp.7143. ⟨10.3390/s24227143⟩. ⟨hal-04780151⟩
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