B1.4 - Development of Simple, Reusable and Sensitive Electrochemical Sensor based on Silver Nanoparticles Modified Gold Screen-Printed Electrode for the Detection of Nitrate in Water
- Event
- SMSI 2023
2023-05-08 - 2023-05-11
Nürnberg - Band
- Lectures
- Chapter
- B1 - Optical Biosensors
- Author(s)
- N. Ben Messaoud, M. dos Santos, R. Queirós, B. Espiña - International Iberian Nanotechnology Laboratory, Braga (Portugal)
- Pages
- 90 - 91
- DOI
- 10.5162/SMSI2023/B1.4
- ISBN
- 978-3-9819376-8-8
- Price
- free
Abstract
A simple, reusable and sensitive electrochemical sensor based on silver nanoparticles modified gold screen-printed electrode has been developed for the detection of nitrate in water for animal feed. The sensor exhibited a wide linear response to nitrate from 50 μM to 10000 μM with a detection limit of 4.38 μM (N=4) which is significantly lower than the maximum contaminant level admitted for watering dairy cattle (3.22X103 μM), and within the sensor linear range. The sensor presented good reproducibility (<10%) and repeatability (2%) as well as selectivity with respect to common interferents found in water.