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Paper-Based Electrochemical Detection of Chlorate
- Source :
- Sensors, Vol 18, Iss 2, p 328 (2018), Sensors (Basel, Switzerland), Sensors; Volume 18; Issue 2; Pages: 328
- Publication Year :
- 2018
- Publisher :
- MDPI AG, 2018.
-
Abstract
- We describe the use of a paper-based probe impregnated with a vanadium-containing polyoxometalate anion, [PMo11VO40]5−, on screen-printed carbon electrodes for the electrochemical determination of chlorate. Cyclic voltammetry (CV) and chronocoulometry were used to characterize the ClO3− response in a pH = 2.5 solution of 100 mM sodium acetate. A linear CV current response was observed between 0.156 and 1.25 mg/mL with a detection limit of 0.083 mg/mL (S/N > 3). This performance was reproducible using [PMo11VO40]5−-impregnated filter paper stored under ambient conditions for as long as 8 months prior to use. At high concentration of chlorate, an additional catalytic cathodic peak was seen in the reverse scan of the CVs, which was digitally simulated using a simple model. For chronocoulometry, the charge measured after 5 min gave a linear response from 0.625 to 2.5 mg/mL with a detection limit of 0.31 mg/mL (S/N > 3). In addition, the slope of charge vs. time also gave a linear response. In this case the linear range was from 0.312 to 2.5 mg/mL with a detection limit of 0.15 mg/mL (S/N > 3). Simple assays were conducted using three types of soil, and recovery measurements reported.
- Subjects :
- Analytical chemistry
02 engineering and technology
Electrochemistry
lcsh:Chemical technology
01 natural sciences
Biochemistry
Article
Analytical Chemistry
chemistry.chemical_compound
electrocatalysis
polyoxometalates
lcsh:TP1-1185
Electrical and Electronic Engineering
Instrumentation
Voltammetry
Detection limit
Filter paper
010401 analytical chemistry
Chlorate
021001 nanoscience & nanotechnology
Atomic and Molecular Physics, and Optics
0104 chemical sciences
paper-based probe
chemistry
Linear range
electrochemical detection
Cyclic voltammetry
chlorate
0210 nano-technology
Sodium acetate
Subjects
Details
- Language :
- English
- ISSN :
- 14248220
- Volume :
- 18
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Sensors
- Accession number :
- edsair.doi.dedup.....68c44ee8c88decabb0d0185e677749c4