Lab-made disposable screen-printed electrochemical sensors and immunosensors modified with Pd nanoparticles for Parkinson’s disease diagnostics

Orzari, Luiz Otávio; Silva, Luiz Ricardo Guterres e; de Freitas, Rafaela Cristina; Brazaca, Laís Canniatti; Janegitz, Bruno Campos

doi:10.1007/s00604-023-06158-3

Cited by 10 publications

(2 citation statements)

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“…The device was used for the determination of Parkinson's biomarkers. The proposed sensor is low cost, can be used as disposable, is easy to apply, and the results obtained are acceptable [26].…”

Section: Introductionmentioning

confidence: 83%

“…The results obtained demonstrated that the sensor is applicable, is low cost, can be produced on a large scale, and can be adapted for microfluidic and wearable devices [25]. Orzari et al (2024) developed an electrode printed with a conductive ink based on carbon black and polyvinyl alcohol. The device was used for the determination of Parkinson's biomarkers.…”

Section: Introductionmentioning

confidence: 97%

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Electrochemical Determination of Catechol Using a Disposable Printed Electrode with Conductive Ink Based on Graphite and Carbon Black

de Oliveira,

de Oliveira Cândido,

Pereira

et al. 2024

Analytica

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Catechol (CT) is a phenolic compound widely used in various industrial sectors, but it is toxic; thus, there is a need for methods that aim to identify and quantify the existence of residues of this material in the environment. In this study a disposable printed electrochemical sensor was developed as an effective alternative for determining CT in water samples. The electrode, called SPEC, was manufactured using the screen-printing method using polyethylene terephthalate (PET) as a support, in which a conductive ink based on carbonaceous materials was used to print the working and auxiliary electrodes and a silver/silver chloride of ink on the reference electrode. The optimal ratio for the conductive ink was 6.25% carbon black, 35.42% graphite, and 58.33% nail polish. The ink obtained was characterized by scanning electron microscopy (SEM). The assessment of the effect of pH on the redox process showed Nernstian behavior (0.057 V pH−1), indicating that the process involves the same number of protons and electrons. Under optimized conditions, with 0.2 mol L−1 acetate buffer at pH 5.0, and by square wave voltammetry, the sensor presented sensitivity values of 0.31 μA L μmol−1, a detection limit of 5.96 μmol L−1, and a quantification limit of 19.87 μmol L−1. The sensor was applied to determine CT in tap water samples, and the results showed recoveries between 97.95 and 100.17%.

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Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 97%