Silver Microelectrode Arrays for Direct Analysis of Hydrogen Peroxide in Low Ionic Strength Samples

Abstract

Silver microelectrode arrays are fabricated by photolithography for a one‐step analysis of H2O2 in low ionic strength samples. The effects of electrode length, width, band‐to‐band separation, connection height, and adhesion layer are evaluated. The developed sensor shows excellent repeatability (RSD=1.20 % (n=5)) and reproducibility (RSD=1.12 % (n=5)) with the linear range of 0.0–10.0 mM, the sensitivity of 9.84±0.34 μA mM−1, and the detection limit of 22.69 μM. The sensor has been successfully applied to detect H2O2 directly without the addition of supporting electrolyte in synthetic urine, tap water, drinking water, and milk samples.

Electrochemical detection of creatinine: exploiting copper(ii) complexes at Pt microelectrode arrays

“…26 Microelectrode arrays demonstrate high sensitivity, low limit of detection, and can handle small sample volumes, making them successful in detecting various organic and inorganic analytes. 27,28 This work progressively investigated the electrochemical characteristics of creatinine complexes with copper ions on platinum (Pt) electrodes, spanning from macro-scale to microscale and culminating in the utilization of microelectrode arrays. Subsequently, a novel direct sensor for creatinine detection was developed, built upon the copper complex formation approach (Scheme 1).…”

“…26 Microelectrode arrays demonstrate high sensitivity, low limit of detection, and can handle small sample volumes, making them successful in detecting various organic and inorganic analytes. 27,28…”

Sensitive adsorptive stripping voltammetric procedure of Imatinib determination in spiked urine samples using solid lead microelectrode

“…The above mentioned fact leads to the possibility of analytes quantification in complicated matrices such as formulations and biofluids. A series of microelectrodes made from various materials were used for urinalysis for determination of the content of organic and inorganic compounds [7][8][9][10] proving the importance of the issue and the broad interest of scientists.…”

Silver Nanoparticle-Decorated Carbon Fiber Microelectrode for Imidacloprid Insecticide Analysis

“…[30][31][32] In contrast, microelectrodes offer distinct benefits in electrochemical sensors, such as allowing measurements in low ionic strength samples, reducing Ohmic drop, increasing mass transfer flux, lowering background charging current, and achieving higher current density. 33,34 This work therefore employs microscopic electrodes to measure IMP directly in samples without electrolyte addition.…”