This work presents the development and validation of an electroanalytical method for Pb(II) determination in a single drop. The electrochemical sensors used were unmodified screen-printed electrode (SPE) Bi-film SPE (BiFSPE). Anodic square wave stripping voltammetry (SWASV) was performed at accumulation potential −1.5 V vs. Ag/AgCl time 60 s. Electroanalysis with did not yield satisfactory resu...

Background: Diazepam belongs to the group of 1,4-benzodiapines. It is used for treatment anxiety, convulsions and as muscle relaxants. The presence a 4,5-azomethine enables its electrochemical detection. Introduction: A screen-printed electrode modified with antimony film was determination diazepam in pharmaceutical preparations Methods: Electrode modification done by ex-situ deposition on comm...

This work presents a new additive manufacturing electrochemical device with conductive graphene and polylactic acid (PLA) filament its application for epinephrine sensing. A three-electrode configuration based on screen-printed electrode architecture an easy-to-connect connector was designed. The sensor surface chemically treated dimethylformamide (DMF) to remove the insulating thermoplastic ex...

An amperometric biosensor for the detection of polyphenols in wine has been developed immobilizing the two enzymes Tyrosinase and Laccase on graphite screen printed electrodes modified with ferrocene. Different immobilization procedures have been carried out, the sensor operational parameters have been optimized, determining the best conditions and the analytical method for the analysis of samp...

This paper presents a fabric based asymmetric supercapacitor (ASC) with metal coated cloths as the electrode and current collector. Graphite paste printed on silver textile (Berlin) is used negative nickel/copper/silver plated (Nora Dell) positive electrode. Biocompatible polyvinyl alcohol (PVA)-potassium chloride (KCl) gel electrolyte for ASC fabrication. During electrochemical process, oxides...

In this paper, the preparation of a potentiometric strip for pH monitoring in saliva samples is reported. The potentiometric strip consists of a solid contact pH-selective and of a solidcontact ionogel reference electrode prepared on a dual screen printed substrate. The screen printing protocols, i.e., type of inks and number of deposits, were adjusted to relatively improve the batch reproducib...

Cadmium sulphide (CdS) quantum dot sensitized solar cells (QDSSCs) based on screen-printed TiO₂ were assembled using a screen-printing technique. The CdS quantum dots (QDs) were grown by using the Successive Ionic Layer Adsorption and Reaction (SILAR) method. The optical properties were studied by UV-Vis absorbance spectroscopy. Photovoltaic characteristics and impedance spectroscopic measureme...