Abstract
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 language | English |
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Pages (from-to) | 3284-3294 |
Number of pages | 11 |
Journal | ACS Sensors |
Volume | 6 |
Issue number | 9 |
DOIs | |
Publication status | Published - 24 Sept 2021 |
Externally published | Yes |
Keywords
- chitosan
- detection in fresh water
- molybdate(VI) reduction
- phosphate
- square wave voltammetry