Electrochemical determination of trace sulfur containing compounds in model fuel based on a silver/polyaniline-modified electrode

Abstract

Prepared GCE/PAni/Ag characterized via spectroscopic techniques (UV-Vis, XRD, XPS) and microscopic techniques (TEM and SEM), was employed for the quantification of benzothiophene, dibenzothiophene and 4,6-dimethyldibenzothiophene in model fuel.

Electrospun Nanofiber Composite Utilized as an Electrocatalyst for the Detection of Acetaminophen in Multifarious Water Samples

“…X-ray analysis of PANI illustrated a relatively sharper peak at 25.5°, along with two low-intensity broad peaks around 20.9 and 14.8°. These respective peaks correspond to the (200), (020), and (011) planes which are characteristic of the semicrystalline structure of PANI in its emeraldine salt (ES) form. , In the XRD pattern of the PANI-CoPc-fur polymeric composite, similar peak angles were observed as in pure PANI, and a peak at 7.29° can be directly correlated with CoPc-fur. The aforementioned spectral trends substantiate the successful incorporation into the PANI matrix. , …”

“…The aforementioned spectral trends substantiate the successful incorporation into the PANI matrix. 15,53 The XRD of f-MWCNTs showed characteristic peaks at 2θ = 25.63°(002), 43.44°(100), and 53.26°(004), consistent with the crystalline structure of multiwalled carbon nanotubes. 55,56 In the XRD spectrum of PANI-CoPc-fur-f- MWCNTs nanoconjugate, analogous peaks to those of f-MWCNTs were found but with reduced intensities which support the nanoconjugation of PANI-CoPc.…”

“…14 Thus, the PANI-modified electrodes have been shown to offer enhanced sensitivity and selectivity toward analytes of interest, making it a highly promising electrochemical mediating polymeric component of CMEs for various electrochemical sensing applications. 15,16 Furthermore, augmenting the electrocatalytic performances of PANI-modified electrodes can be achieved by the inclusion of carbon-based materials such as carbon nanotubes into PANI composites which can increase the mechanical strength and minimize leaching of components from the thin electrocatalytic film. 17 In addition, these polymeric PANI-carbon nanotube conjugates exhibit enhanced electrical conductivity than the nanomaterial or polymer, individually.…”

“…These properties manifest in the form of the distinctive redox transformation and high capacitance of PANI . Thus, the PANI-modified electrodes have been shown to offer enhanced sensitivity and selectivity toward analytes of interest, making it a highly promising electrochemical mediating polymeric component of CMEs for various electrochemical sensing applications. , …”

A Simple and Sensitive Inhibitory Kinetic Method for the Carbocisteine Determination

“…Numerous reports are available for the micro-level determination of sulfur-containing drugs and molecules in biological samples and pharmaceutical preparations [20][21][22][23]. The determination methods includes potentiometry [24], NMR-spectrometry [25], colorimetry [20], chromatography [26][27][28], flow injection analysis [29], fluorimetry [30], voltammetry [31] and spectrophotometry [32,33]. The high initial investment, timeconsuming processes, high costs of sample analysis, and heavy instrumentation are major concerns of many reported methods.…”