Avaliação teórica do uso do oxihidróxido de vanádio trivalente na detecção eletroquímica de nandrolona
The theoretical evaluation of the use of trivalent vanadium oxyhydroxide in the electrochemical determination of nandrolone
DOI:
https://doi.org/10.15446/rcciquifa.v47n3.77372Palabras clave:
elétrodos quimicamente modificados, nandrolona, oxihidróxido de vanádio (III), eletrorredução catódica, estado estacionário estável (pt)chemically modified electrodes, nandrolone, vanadium (III) oxyhydroxide, cathodic electrochemical reduction, stable steady-state (en)
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Pela primeira vez foi descrito um caso interessante de uso do oxihidróxido de vanádio trivalente (VO(OH)) como modificador de elétrodo na detecção eletroquímica de nandrolona. Foi mostrado que o oxihidróxido de vanádio pode ser um modificador eficiente para a detecção de nandrolona, mas, ao contrário da maioria dos casos de uso de oxihidróxido de cobalto, composto parecido, o processo é catódico e dá-se em meio moderadamente ácido a neutro. O comportamento oscilatório, no sistema, é possível apenas por causa das influências do processo da eletrorredução de vanádio tetravalente em trivalente na dupla camada elétrica.
An interesting case of the use of trivalent vanadium oxyhydroxide (VO(OH)) as an electrode modifier for nandrolone electrochemical determination has been described for the first time. It was shown that vanadium (III) oxyhydroxide may be an efficient electrode modifier for nandrolone determination, but, contrarily to the majority of the cases of the use of cobalt (III) oxyhydroxide, which is a relative compound, the process is cathodic and it is realized in moderately acid solutions, tending to neutral. The oscillatory behavior in the system is possible, due to the influence of the electrochemical reduction of tetravalent vanadium to trivalent in double electric layer.
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