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Updated: Oct 23, 2025

High-Throughput Measurement and Classification of Organic P in Environmental Samples
Published on: June 8, 2011
Amperometric Environmental Phosphate Sensors
Yuanyuan Lu1, Xiuting Li2, Danlei Li1
1Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford OX1 3QZ, U.K.
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.
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