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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/5597

    Título
    Electrochemical detection of fentanyl with screen-printed carbon electrodes using square-wave adsorptive stripping voltammetry for forensic applications
    Autor
    Ott, Colby E.
    Cunha Silva, HugoUBU authority Orcid
    Kuberski, Sara L
    Cox, Joseph A.
    Arcos Martínez, JuliaUBU authority Orcid
    Arroyo Mora, Luís E.
    Publicado en
    Journal of Electroanalytical Chemistry. 2020, V. 873, 114425
    Editorial
    Elsevier
    Fecha de publicación
    2020-09
    ISSN
    1572-6657
    DOI
    10.1016/j.jelechem.2020.114425
    Abstract
    Square-wave adsorptive stripping voltammetry (SWAdSV) is proposed as a fast, simple, and sensitive approach toward the detection, identification, and semi-quantitation of fentanyl in seized drug samples using screen-printed carbon electrodes. Electrochemical oxidation of fentanyl resulted in the formation of two anodic peaks, one at 0.75 V (peak I) and the second at 0.88 V (peak II) versus a Ag/AgCl pseudo reference electrode. Voltammetric measurements were conducted under optimized experimental conditions using fentanyl standards ranging from 0.076 μg/mL to 6.9 μg/mL, which resulted in a limit of detection of 0.037 μg/mL. Reproducibility was assessed as the average percent relative standard deviation of the slopes of calibration curves and was 2.6% for oxidation peak I and 7.4% for oxidation peak II in cell. Detection capabilities were assessed in a 5-mL cell and in a 100 microliter drop. Interference studies were conducted with cocaine, methamphetamine, quinine, caffeine, and acetaminophen. The mechanism for the electrochemical oxidation of fentanyl to norfentanyl is also described. Accuracy and suitability of the method for seized drug analysis was assessed using 11 simulated samples. Suitability of the method for future analysis of fentanyl in oral fluid was assessed.
    Palabras clave
    Fentanyl
    Screen-printed electrodesFentanyl voltammetric determination
    Forensic science
    Oral fluid
    Seized drugs
    Materia
    Química analítica
    Chemistry, Analytic
    URI
    http://hdl.handle.net/10259/5597
    Versión del editor
    https://doi.org/10.1016/j.jelechem.2020.114425
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    Documento(s) sujeto(s) a una licencia Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internacional
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