Amperometric Environmental Phosphate Sensors

Yuanyuan Lu; Xiuting Li; Danlei Li; Richard G. Compton

doi:10.1021/acssensors.1c01035

Amperometric Environmental Phosphate Sensors

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

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
Pages (from-to)	3284-3294
Number of pages	11
Journal	ACS Sensors
Volume	6
Issue number	9
DOIs	https://doi.org/10.1021/acssensors.1c01035
Publication status	Published - 24 Sept 2021
Externally published	Yes

Keywords

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

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10.1021/acssensors.1c01035

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keywords = "chitosan, detection in fresh water, molybdate(VI) reduction, phosphate, square wave voltammetry",

author = "Yuanyuan Lu and Xiuting Li and Danlei Li and Compton, {Richard G.}",

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AU - Lu, Yuanyuan

AU - Li, Xiuting

AU - Li, Danlei

AU - Compton, Richard G.

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AB - 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.

KW - chitosan

KW - detection in fresh water

KW - molybdate(VI) reduction

KW - phosphate

KW - square wave voltammetry

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JO - ACS Sensors

JF - ACS Sensors

IS - 9

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Amperometric Environmental Phosphate Sensors

Abstract

Keywords

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