Trace-Level Sensing of Phosphate for Natural Soils by a Nano-Screen-Printed Electrode

• DOI: 10.1021/acs.est.1c05363
• Publication Date: 2021-09-22T16:53:41Z
• Authors: Yuanyuan Lu; Qingwen Lan; Chuxuan Zhang; Boyi Liu; Xiaochun Wang; Xiangyang Xu; Xinqiang Liang
• Keywords: TRACE (psycholinguistics)

Phosphate as one of the most essential components living systems, robust analytical techniques available for phosphate sensing in natural waters and soils are monitoring predicting water quality agronomic evaluation phosphate. Using cyclic voltammetry, a point-of-use electrochemical sensor zirconium dioxide/zinc oxide/multiple-wall carbon nanotubes/ammonium molybdate tetrahydrate/screen printed electrode (ZrO2/ZnO/MWCNTs/AMT/SPE) was applied to explore electro-redox reaction phosphomolybdate complexes on surface electrode, which produced quantitative response anions. The modification with ZrO2/ZnO/MWCNTs nanocomposites is able generate electroactive species via chemical between molybdenum (Mo(VI)) targeted anions, leading sensitive detection technique trace lower limit (LOD = 2.0 × 10–8 mol L–1), higher reproducibility, anti-interference, precision different soil sources. This system will be great potential advance trace-level understanding especially field environmental analysis.