![]() To investigate the utility of the proposed method for the determination of oxycarboxin in real samples, a quantitative determination of Oxy was performed in spiked river water samples. Under optimal analytical conditions, the linear ranges of Oxy concentrations 8.0 × 10 −6–5.0 × 10 −5 mol L −1 with limit of detection of 2.0 × 10 −6 mol L −1 for bare GCE and 6.0 × 10 −6–9.0 × 10 −5 mol L −1 with limit of detection of 1.1 × 10 −6 mol L −1 for GCE/MWCNTs were obtained. ![]() The best analytical signal was obtained in the medium of sulfuric acid on both electrodes. The effect of an amplitude ( E SW), a frequency ( f), a step potential ( ΔE s), an accumulation potential ( E acc) and time ( t acc), and equilibration time ( t eq) was investigated. An electrochemical procedure for the quantitative determination of oxycarboxin at a glassy carbon electrode (GCE) and a glassy carbon electrode modified with multi-walled carbon nanotubes (GCE/MWCNTs) based on square wave adsorptive stripping voltammetry (SWAdSV) is presented for the first time.
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