We report a novel strategy for decentralized monitoring of gaseous elemental mercury (GEM), Hg(0), in ambient air by pocket-size low-cost analytical device. The essential components the system are gold nanoparticles-modified screen-printed carbon electrode (AuNPs-SPCE) passive or active sampling amalgamation from and miniaturized potentiostat (pen drive size). was connected to smartphone determ...

A novel multi-channel electrode array sensing device was fabricated by screen-printing techniques using 96-well plate as the template. To confirm its practical value, we developed a one-step preparation of multi-walled carbon nanotubes (MWCNTs) doped electrode array by an ink containing MWCNTs, which was applied to the simultaneous detection of a variety of biological samples and environmental ...

Poly(1,5-diaminonaphthalene) has been electropolymerized on the screen-printed device with a three-electrode configuration. The modified electrodes have developed as new electrode for electrochemical determination of trace levels lead ions (Pb2+). poly(1,5-diaminonaphthalene) film prevents deposition Pb2+ into surface defects bare carbon and possesses sensitivity to heavy metal thanks amine sec...

This work reports an amperometric biosensor for the determination of miRNA-21, a relevant oncogene. The methodology involves a competitive DNA-target miRNA hybridization assay performed on the surface of magnetic microbeads (MBs) and amperometric transduction at screen-printed carbon electrodes (SPCEs). The target miRNA competes with a synthetic fluorescein isothiocyanate (FITC)-modified miRNA ...

The addition to the carbon ink, a major component of a screen-printed electrode (SPE), of an aliquot (10%) of Prussian Blue (PB)-modified glassy carbon (PB-GC) particles, resulted in an interference free “ready to use” amperometric H2O2 sensor (Vapp = −50 mV) with a LOD of 3 × 10−7 mol/l and a sensitivity of 135 mA (mol l−1 cm2). A storage stability of up to 8 months and an operational stabilit...

An amperometric magnetoimmunosensor for the determination of human p53 protein is described in this work using a sandwich configuration involving the covalent immobilization of a specific capture antibody onto activated carboxylic-modified magnetic beads (HOOC-MBs) and incubation of the modified MBs with a mixture of the target protein and horseradish peroxidase-labeled antibody (HRP-anti-p53)....