Results 11 to 20 of about 9,441 (210)

A scanning tunneling microscopy based potentiometry technique and its application to the local sensing of the spin Hall effect

open access: yesAIP Advances, 2017
A scanning tunneling microscopy based potentiometry technique for the measurements of the local surface electric potential is presented. A voltage compensation circuit based on this potentiometry technique is developed and employed to maintain a desired ...
Ting Xie   +6 more
doaj   +2 more sources

Potentiometry - Theoretical Principles and Analytical Applications [PDF]

open access: yes, 2021
Potentiometry is an electroanalytical technique that is usually employed to analyze the concentration of ionic solutes in aqueous and non-aqueous media.
Gulaboski, Rubin
core   +2 more sources

Comparative analysis of ionization constants determination using spectrophotometry and potentiometry: 3-aminobenzoic acid, 1,3,5-benzenetricarboxylic acid and tyrosine [PDF]

open access: yes, 2022
The ionization constant (usually expressed in logarithmic form, pKa) is important physicochemical parameter which is used to characterize the acid-base chemistry of a compound.
Marković, Olivera S.   +3 more
core   +8 more sources

Speciation Study on O-Phosphorylethanolamine and O-Phosphorylcholine: Acid–Base Behavior and Mg2+ Interaction

open access: yesFrontiers in Chemistry, 2022
In the present study, the acid–base behavior of compounds constituting the headgroups of biomembranes, O-phosphorylethanolamine (PEA), and O-phosphorylcholine (PPC) was investigated by potentiometric titrations in NaCl aqueous solutions at different ...
Donatella Aiello   +5 more
doaj   +1 more source

Controle da qualidade na determinação potenciométrica de sulfetos volatilizáveis por acidificação (SVA) utilizando adições de padrão

open access: yesQuímica Nova, 2012
This paper presents a quality assurance and quality control protocol in order to ensure the reliability of analytical results for the determination of acid volatile sulfides in environmental samples by potentiometry.
Enelton Fagnani   +3 more
doaj   +1 more source

Bibliographic study of potentiometric methods of wine and must analysis

open access: yesOENO One, 1995
In this paper, an overview of the application of potentiometry to wine and must analysis is presented. The large number of electrodes nowadays available with good characteristics for routine use, namely good selectivity and low response times, allowing ...
Ricardo Pérez-Olmos   +4 more
doaj   +1 more source

A Novel Reduced Graphene Oxide Modified Carbon Paste Electrode for Potentiometric Determination of Trihexyphenidyl Hydrochloride in Pharmaceutical and Biological Matrices

open access: yesSensors, 2021
A novel promising carbon paste electrode with excellent potentiometric properties was prepared for the analysis of trihexyphenidyl hydrochloride (THP), the acetylcholine receptor and an anticholinergic drug in real samples.
Josip Radić   +4 more
doaj   +1 more source

Membranes of Nata de coco-nanoparticles Fe3O4 For Diazinon Sensors [PDF]

open access: yesJournal of Pure and Applied Chemistry Research, 2018
Development of diazinon sensors using mixed membranes of nata de coco and Fe3O4 nanoparticles on the SPCE (screen printed carbon electrode) surface has been carried out potentiometrically.
Didik Pramana   +2 more
doaj   +1 more source

Dissolution périodique du nickel dans l'acide nitrique en présence de chlorures

open access: yesCHIMIA, 1975
In the presence of Cl-, nickel dissolves periodically in HNO3 for normalities between 9 < N < 17. This phenomenon is investigated by potentiometry and thermometry.
Vincent J. Farage   +2 more
doaj   +1 more source

Chemically Induced pH Perturbations for Analyzing Biological Barriers Using Ion-Sensitive Field-Effect Transistors

open access: yesSensors, 2021
Potentiometric pH measurements have long been used for the bioanalysis of biofluids, tissues, and cells. A glass pH electrode and ion-sensitive field-effect transistor (ISFET) can measure the time course of pH changes in a microenvironment as a result of
Tatsuro Goda
doaj   +1 more source

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