Amperometric Environmental Phosphate Sensors

Yuanyuan Lu, Xiuting Li, Danlei Li, Richard G. Compton*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


We report a novel amperometric sensor for aqueous phosphate ions in freshwater systems based on the reductive square wave voltammetry of molybdate(VI) anions immobilized within a chitosan matrix deposited on a glassy carbon electrode. A sensitivity of 4.4 ± 0.1 μA/μM was realized together with a LOD of 0.15 μM. The sensor was insensitive to chloride and nitrate ions below a threshold concentration of 1.0 mM. Analytical measurements were successfully made in authentic samples of tap and pond water.

Original languageEnglish
Pages (from-to)3284-3294
Number of pages11
JournalACS Sensors
Issue number9
Publication statusPublished - 24 Sept 2021
Externally publishedYes


  • chitosan
  • detection in fresh water
  • molybdate(VI) reduction
  • phosphate
  • square wave voltammetry


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