Paper-Based Electrochemical Detection of Chlorate
AbstractWe 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. View Full-Text
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Shriver-Lake, L.C.; Zabetakis, D.; Dressick, W.J.; Stenger, D.A.; Trammell, S.A. Paper-Based Electrochemical Detection of Chlorate. Sensors 2018, 18, 328.
Shriver-Lake LC, Zabetakis D, Dressick WJ, Stenger DA, Trammell SA. Paper-Based Electrochemical Detection of Chlorate. Sensors. 2018; 18(2):328.Chicago/Turabian Style
Shriver-Lake, Lisa C.; Zabetakis, Dan; Dressick, Walter J.; Stenger, David A.; Trammell, Scott A. 2018. "Paper-Based Electrochemical Detection of Chlorate." Sensors 18, no. 2: 328.
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