A5075793287- Analytical Chemistry and Sensors
- Electrochemical sensors and biosensors
- Analytical Methods in Pharmaceuticals
- Electrochemical Analysis and Applications
- Antibiotics Pharmacokinetics and Efficacy
- Analytical Chemistry and Chromatography
- Pharmacological Effects and Assays
- Analytical chemistry methods development
- Pesticide Residue Analysis and Safety
- Molecular Sensors and Ion Detection
- Gas Sensing Nanomaterials and Sensors
- Inorganic and Organometallic Chemistry
- Conducting polymers and applications
- Innovations in Concrete and Construction Materials
- Recycled Aggregate Concrete Performance
- Phytochemical Studies and Bioactivities
- Water Quality Monitoring and Analysis
- Synthesis and Biological Evaluation
- Synthesis and Characterization of Heterocyclic Compounds
- Pharmaceutical Quality and Counterfeiting
- Antibiotic Resistance in Bacteria
- Mycotoxins in Agriculture and Food
- Natural product bioactivities and synthesis
- Computational Drug Discovery Methods
- Nonlinear Optical Materials Research
Cairo University
2015-2025
This study compares between unmodified carbon paste (CPE; the has no ion pair) and polyvinyl chloride (PVC) membrane selective electrodes that were used in potentiometric determination of ketotifen fumarate (KTF), where sodium tetraphenylborate (NaTPB) was as titrant. The performance characteristics these sensors evaluated according to IUPAC recommendations which reveal a fast, stable, linear response for KTF over concentration range 10 −7 −2 mol L −1 . show Nernstian slope value mV decade...
This paper describes the development of screen-printed (SPE) and carbon paste (CPE) sensors for rapid sensitive quantification naphazoline hydrochloride (NPZ) in pharmaceutical formulations. work compares electroactivity conventional electrodes towards potentiometric titration NPZ. The repeatability accuracy measurements performed analysis these matrices using new screen printed were evaluated. influence electrode composition, conditioning time pH test solution, on performance investigated....
Three types of ion-selective electrodes (carbon paste, PVC membrane and screen printed electrodes) have been proposed for determining orphenadrine citrate (OphC) in pure solution pharmaceutical preparation based on the ion-pair formation between OphC with sodium tetraphenylborate. The three were prepared using five plasticizers each type electrodes. showed a linear response good Nernstian slope 57.20 ± 0.70, 56.81 1.6 57.09 0.2 mV decade-1 over concentration range 10-6 to 10-2 mol L-1 CPE,...
Carbon paste electrode has been developed for the potentiometric determination of chlorpromazine HCl drug. This work focused on fabrication carbon ion selective drug under investigation using titration with sodium tetraphenylborate. The performance such sensor in is compared those PVC membrane, coated wire and graphite electrodes. was applied to pharmaceutical preparations. repeatability accuracy measurements performed analysis these matrices new were evaluated. influence composition,...
In this study, a comparison between modified screen printed (SPE) and carbon paste (CPE) electrodes is described for determination of naphazoline hydrochloride in pure pharmaceutical formulations. The performance characteristics the were evaluated terms composition, life span, pH, temperature. show Nernstian slope values 55.4±2.2 59.6±1.3 mV decade -1 at 25 o C, over concentration ranges 5.0x10 -7 – 3.5x10 -2 3.0x10 2.5x10 mol L with limit detection 2.512x10 3.162x10 SPE CPE, respectively....
Simple, rapid and sensitive spectrophotometric methods were developed for the determination of carbamazepine mosapride citrate drugs in pure pharmaceutical dosage forms. These are based on ion pair charge transfer complexation reactions. The first method is reaction drug with Mo(V)–thiocyanate hydrochloric acid medium followed by an extraction coloured ion-pair 1,2-dichloroethane absorbance was measured at 470 nm. second formation ion-pairs between two dyestuff reagents namely bromothymol...
The construction and performance characteristics of ranitidine hydrochloride (RNH) selective electrodes are described. Two types electrodes: carbon paste screen printed were constructed based on the ion-pair formation during potentiometric titration with sodium tetraphenylborate. fully characterized in terms plasticizer type, response time, lifetime, soaking, titrant, pH temperature. CPE SPE exhibited Nernstian for RNH concentration range from 1.0×10−7 to 1.0×10−2 mol L-1 a slope 55.74±1...
Newly developed modified and<italic>in situ</italic>modified carbon paste sensors were for the determination of chlorpromazine hydrochloride (CPZHC) in pharmaceutical formulations and biological fluids (urine serum).
The construction and performance characteristics of diphenhydramine hydrochloride (DPH) modified screen printed (SPE) carbon paste (CPE) electrodes with DPH-tetrapheylborate ion pair (DPH-TPB) (MSPE MCPE) sodium tetraphenyl borate pairing agent (NaTPB) (in situ) (ISPE ICPE) using tricrysylphosphate (TCP) as plasticizer are described. These exhibit suitable response to DPH in the concentration range 1x10-1 1x10-6 mol L-1 lower detection limit 9.65x10-7, 9.68x10-7, 9.78x10-7 9.76x10-7 time...
The construction and performance characteristics of new sensitive selective in situ modified screen printed (ISPE) carbon paste (ICPE) electrodes for determination naphazoline hydrochloride (NPZ-HCl) have been developed. under investigation show potentiometric response NPZ-HCl the concentration range from 7.0×10-7 to 1.0×10-2 M at 25 °C electrode is independent pH 3.1-7.9. These sensors slope values 59.7±0.6 59.2±0.2 mV decade-1 with detection limit 5.6×10-7 5.9×10-7 using ISPE ICPE,...
Simple, precise, inexpensive and sensitive voltammetric methods have been developed for the determination of flavoxate HCl (FLXHC) tolterodine tartrate (TOLT) in bulk, pharmaceutical dosage forms human urine using ferrocene modified carbon paste electrode (FMCPE) FLXHC polyethylene glycol (PEGMCPE) TOLT. The electrochemical behavior TOLT showed irreversible diffusion-controlled oxidation processes Britton-Robinson (BR) buffer over entire pH range from 2 to 6 9 peak current was evaluated as a...