Preparation and characterization of novel MWCNTs/Fe-Co doped TNTs nanocomposite for potentiometric determination of sulpiride in real water samples

Abstract

Novel multiwalled carbon nanotubes/ Fe-Co doped titanate nanotubes nanocomposite (MWCNTs/Fe-Co doped TNTs) facilitated the charge transfer and enhanced sensitivity and selectivity. Herein, three novel modified carbon paste sensors (CPSs) based on MWCNTs (sensor I), Fe-Co doped TNTs (sensor II) and MWCNTs/Fe-Co doped TNTs composite (sensor III) were fabricated for a simple, low cost and high accuracy electrochemical method for the potentiometric determination of sulpiride (SLP). The sensors exhibited excellent Nernstian slopes 57.1 ± 0.4, 56 ± 0.5 and 58.8 ± 0.2 mV decade−1 with detection limits (DL) 7.6 × 10−7, 1.58 × 10−6 and 8.7 × 10−8 mol L−1, quantification limits (QL) 2.5 × 10−6, 5.2 × 10−6 and 2.9 × 10−7 mol L−1 for a long lifetime 20, 18, and 25 weeks for sensors (I), (II), and (III), respectively. The modified sensor (III) was applicable by measuring the concentration of spiked SLP in pure solutions, pharmaceutical products, human urine, and real water samples. The proposed method can be used as an important analytical tool in the quality control of the pharmaceutical industry.

Electrical and Electrochemical Sensors Based on Carbon Nanotubes for the Monitoring of Chemicals in Water—A Review

“…Finally, references [ 76 , 203 , 204 , 205 ] address the topic of emerging contaminants with electrochemical sensors based on CNT modified carbon electrodes, through the angle of drugs and hormones [ 76 , 203 ] and of bisphenol A [ 204 , 205 , 206 ]. Emerging contaminants are compounds derived from manufactured chemicals and that despite being present only in µg/L concentrations (or below) in water bodies are known to have strong impact on health and environment [ 207 ].…”

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

“…The operational pH range of the constructed sensor was checked for 1.0 × 10 −3 and 1.0 × 10 −4 mol L −1 DTZ solutions over a wide pH range (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12). The constructed sensor showed very slight potential uctuations in a pH range of 2.0-8.0 (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.…”

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

“…The properties of nanocomposites have led researchers and companies to explore the use of nanocomposites in a variety of fields [48] which can be ascribed to their remarkable chemical, physical and mechanical properties. Therefore, nanocomposites are predicted to provide superior capabilities for potentiometric sensors [44,49,50]. This behavior can effectively expedite the reproducibility, stability and electrocatalytic characteristics of the sensor [51].…”