Congrats on Carol, Payton, Maggie, and Anju’s paper in Sensors!
Paper title: Printed Potentiometric Nitrate Sensors for Use in Soil
Abstract: Plant-available nitrogen, often in the form of nitrate, is an essential nutrient for plant growth. However, excessive nitrate in the environment and watershed has harmful impacts on natural ecosystems and consequently human health. A distributed network of nitrate sensors could help to quantify and monitor nitrogen in agriculture and the environment. Here, we have developed fully printed potentiometric nitrate sensors and characterized their sensitivity and selectivity to nitrate. Each sensor comprises an ion-selective electrode and a reference electrode that are functionalized with polymeric membranes. The sensitivity of the printed ion-selective electrodes was characterized by measuring their potential with respect to a commercial silver/silver chloride reference electrode in varying concentrations of nitrate solutions. The sensitivity of the printed reference electrodes to nitrate was minimized with a membrane containing polyvinyl butyral (PVB), sodium chloride, and sodium nitrate. Selectivity studies with sulphate, chloride, phosphate, nitrite, ammonium, calcium, potassium, and magnesium showed that high concentrations of calcium can influence sensor behavior. The printed ion-selective and reference electrodes were combined to form a fully printed sensor with sensitivity of −48.0 ± 3.3 mV/dec between 0.62 and 6200 ppm nitrate in solution and −47 ± 4.1 mV/dec in peat soil.
Publication:
-
Printed Potentiometric Nitrate Sensors for Use in Soil
Carol L. Baumbauer,
Payton J. Goodrich,
Margaret E. Payne,
Tyler Anthony,
Claire Beckstoffer,
Anju Toor,
Whendee Silver,
and
Ana C. Arias
Sensors,
2022
22,
4095.
[Abstract]
[Bibtex]
[PDF]
Plant-available nitrogen, often in the form of nitrate, is an essential nutrient for plant growth. However, excessive nitrate in the environment and watershed has harmful impacts on natural ecosystems and consequently human health. A distributed network of nitrate sensors could help to quantify and monitor nitrogen in agriculture and the environment. Here, we have developed fully printed potentiometric nitrate sensors and characterized their sensitivity and selectivity to nitrate. Each sensor comprises an ion-selective electrode and a reference electrode that are functionalized with polymeric membranes. The sensitivity of the printed ion-selective electrodes was characterized by measuring their potential with respect to a commercial silver/silver chloride reference electrode in varying concentrations of nitrate solutions. The sensitivity of the printed reference electrodes to nitrate was minimized with a membrane containing polyvinyl butyral (PVB), sodium chloride, and sodium nitrate. Selectivity studies with sulphate, chloride, phosphate, nitrite, ammonium, calcium, potassium, and magnesium showed that high concentrations of calcium can influence sensor behavior. The printed ion-selective and reference electrodes were combined to form a fully printed sensor with sensitivity of −48.0 ± 3.3 mV/dec between 0.62 and 6200 ppm nitrate in solution and −47 ± 4.1 mV/dec in peat soil.
@article{Carol_nitrate,
author = {Baumbauer, Carol L. and Goodrich, Payton J. and Payne, Margaret E. and Anthony, Tyler and Beckstoffer, Claire and Toor, Anju and Silver, Whendee and Arias, Ana C.},
title = {Printed Potentiometric Nitrate Sensors for Use in Soil},
year = {2022},
doi = {https://doi.org/10.3390/s22114095},
publisher = {MDPI},
url = {https://www.mdpi.com/1424-8220/22/11/4095/htm},
journal = {Sensors},
volume = {22},
number = {4095},
thumbnail = {carol2022nitrate.png},
pdf = {carol2022nitrate.pdf}
}
