Electrochemical impedimetric sensing of nitrate contamination in water

Li Xie, Asif I. Zia, Subhas Mukhopadhyay, Lucy Burkitt

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

2 Citations (Scopus)


This paper describes the design and development of a sensing system to detect the nitrate concentration by using planar interdigital sensor immersed in the water sample. Water samples were prepared containing two different salts: Sodium Nitrate (NaNO3) and Ammonium Nitrate (NH4NO3) with the concentration ranging from 0.02 PPM to 10 PPM by using the serial dilution method. The water sample was tested by both the commercial equipment (LCR meter) and designed system. Although a difference was observed between these two results, the designed system shows a good linear relationship between the low concentration (0.02 - 0.5 PPM) of the water solution and the real part of the impedance. However, the relationship was changed from linear to logarithmic scale at the high concentration (0.05 - 10 PPM) of the water solution. The computational formula of concentration was formed from these results. This system has a potential to be used in-situ nitrate contamination detection with real-time monitoring.

Original languageEnglish
Title of host publicationICST 2015
Subtitle of host publicationproceedings of the 9th International Conference on Sensing Technology
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Number of pages6
ISBN (Electronic)9781479963140
Publication statusPublished - 2015
Externally publishedYes
Event9th International Conference on Sensing Technology, ICST 2015 - Auckland, New Zealand
Duration: 8 Dec 201511 Dec 2015


Other9th International Conference on Sensing Technology, ICST 2015
Country/TerritoryNew Zealand


  • Electrochemical Impedance spectroscopy
  • Nitrate Detection
  • Planar Interdigital Sensor
  • Water Contamination


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