Novel Zn‐Fe LDH/MWCNTs and Graphene/MWCNTs Nanocomposites Based Potentiometric Sensors for Benzydamine Determination in Biological Fluids and Real Water Samples

Abstract

Two sensitive and selective potentiometric sensors based on zinc‐iron layered double hydroxides/multiwalled carbon nanotubes (Zn−Fe LDH/MWCNTs) (sensor I) and graphene/multiwalled carbon nanotubes (Gr/MWCNTs) (sensor II) nanocomposites were developed for benzydamine hydrochloride (Benz) determination. The investigated sensors displayed excellent Nernstian slopes 58.5±0.7 and 59.5±0.5 mV decade−1, detection limits 8.3×10−7 and 1.9×10−7 mol L−1, long lifetimes, adequate selectivity, high chemical, and thermal stability within pH range of 2.4–8.5 for sensors І and ІІ, respectively. The surface morphology of sensors was analyzed using a Transmission Electron Microscope (TEM). The analytical method was efficiently implemented for Benz determination in biological fluids and surface water samples.

A novel potentiometric sensor based on ZnO decorated polyaniline/coal nanocomposite for diltiazem determination

“…Repeatability and reproducibility are referred to the degree of agreement between the results of subsequent measurements of the same analyte, performed under specific conditions. 13 …”

“…Repeatability and reproducibility are referred to the degree of agreement between the results of subsequent measurements of the same analyte, performed under specic conditions. 13 The reversibility of a sensor which is the ability of the sensor to recover, or return to its original background/baseline condition was checked by recording the sensor response in the sequence high-to-low from 1.0 × 10 −2 to 1.0 × 10 −7 mol L −1 sample concentrations of (DTZ) drug. The results showed that the response of the sensors was reversible (Fig.…”

“…These developed sensors have the potential to be applied to provide quick analysis, rapid responses, excellent selectivity, and inexpensive analysis. [11][12][13] All of these merits make potentiometric approaches the most favorable approach for DTZ assessment. Nanomaterials exhibit improved properties that are not observable in bulk materials.…”

Development of Solid-Contact Potentiometric Sensor Utilized Nanocarbon-filled Poly (vinyl chloride) Membrane as Ion-to-electron Transducing Layer

“…Unfortunately, in this case the resulting EDL has a very small capacitance, which leads to a significant drift of potentiometric response during the time [32,33]. To decide this problem, it has been proposed to disperse different Carbon Nanoparticles (CNPs) directly into the ion-sensing membrane compositions [34][35][36][37][38][39]. The functionalized nanomaterials were found to be favorable for developing such type of sensors [40][41][42].…”