Preparation and characterization of in situ carbon paste and screen-printed potentiometric sensors for determination of econazole nitrate: surface analysis using SEM and EDX

The speciation of Al-OH complexes in terms of Ala, Alb and Alc could be achieved by traditional ferron assay and Alb is generally considered as Al13, however, the inherent correlation between them remains an enigma. This paper presents a modified ferron assay to get precise determination of Al13 using nonlinear least squares analysis, and to clarify the correlation between Alb and Al13. Two parallel reactions conforming to pseudo-first-order kinetics can simulate the complicate reactions between polynuclear complexes and ferron successfully. Four types of experimental kinetic constant (k value) of Al-OH complexes can be observed by this method when investigating three typical aluminium solutions. Comparing with the results of 27Al NMR, the species with moderate kinetics around 0.001 s−1 can be confirmed to resemble to Al13 polycation. The other types of kinetics are also well-regulated in partially neutralized aluminium solutions with various OH/Al ratios (b values) in the range 0 ∼ 2.5. It would provide potential means to trace the in-situ formation of Al13 in dilute solutions such as coagulation with Al-based coagulants

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Development and surface characterization of a bis(aminotriazoles) derivative based renewable carbon paste electrode for selective potentiometric determination of Cr(III) ion in real water samples

Microchemical Journal ◽

10.1016/j.microc.2020.105478 ◽

2020 ◽

Vol 159 ◽

pp. 105478

Author(s):

M.A. Zayed ◽

Ashraf A. Abbas ◽

Walaa H. Mahmoud ◽

Aya E. Ali ◽

Gehad G. Mohamed

Keyword(s):

Carbon Paste Electrode ◽

Water Samples ◽

Surface Characterization ◽

Potentiometric Determination ◽

Carbon Paste ◽

Real Water Samples ◽

Paste Electrode

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In situ structure and force characterization of 2D nano-colloids at the air/water interface

Soft Matter ◽

10.1039/c9sm01476d ◽

2019 ◽

Vol 15 (42) ◽

pp. 8475-8482

Author(s):

Giovanni Li-Destri ◽

Roberta Ruffino ◽

Nunzio Tuccitto ◽

Giovanni Marletta

Keyword(s):

Quantitative Determination ◽

Experimental Method ◽

Water Interface ◽

Liquid Interfaces ◽

Interaction Forces ◽

Air Water Interface

We have developed a novel experimental method, which enables quantitative determination of interaction forces between interfacial nanoparticles as a function of the inter-particle distance at liquid interfaces.

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Fabrication of chemically and in situ modified carbon paste electrodes for the potentiometric determination of chlorpromazine HCl in pure pharmaceutical preparations, urine and serum

New Journal of Chemistry ◽

10.1039/c7nj02780j ◽

2017 ◽

Vol 41 (24) ◽

pp. 15612-15624 ◽

Cited By ~ 9

Author(s):

Gehad G. Mohamed ◽

Eman Y. Z. Frag ◽

M. A. Zayed ◽

M. M. Omar ◽

Sally E. A. Elashery

Keyword(s):

Biological Fluids ◽

Pharmaceutical Preparations ◽

Pharmaceutical Formulations ◽

Carbon Paste ◽

Chlorpromazine Hydrochloride ◽

Carbon Paste Electrodes ◽

Urine And Serum ◽

Modified Carbon Paste Electrodes

Newly developed modified and in situ modified carbon paste sensors were developed for the determination of chlorpromazine hydrochloride (CPZHC) in pharmaceutical formulations and biological fluids (urine and serum).

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