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Journal articles on the topic 'Potentiometric Data'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Partanen, Jaakko I., Pekka M. Juusola та Virginie Verraes. "Re-evaluation of the second thermodynamic dissociation constants of α-alanine, valine, and leucine using potentiometric data measured for aqueous potassium chloride solutions at 298.15 K". Canadian Journal of Chemistry 83, № 1 (2005): 46–56. http://dx.doi.org/10.1139/v04-164.

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Equations were developed for the calculation of the second stoichiometric (molality scale) dissociation constants (Km2) of α-alanine, valine, and leucine in aq. KCl solutions at 298.15 K from the revised thermodynamic dissociation constants (Ka2) of these acids and the ionic strength (Im) of the solutions. The ionic strength of the solutions considered in this study is determined mostly by KCl alone, and the equations for Km2 were based on the single-ion activity coefficient equations of the Hückel type. The existing literature data obtained from Harned cell measurements and new potentiometric

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2

Isvoranu, Marian, Constantin Luca, Maria Pleniceanu, and Cezar Spinu. "Studies on a Pb2+ - selective electrode with a macrocyclic liquid membrane: Potentiometric determination of pb2+ ions." Journal of the Serbian Chemical Society 71, no. 12 (2006): 1345–52. http://dx.doi.org/10.2298/jsc0612345i.

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This paper presents experimental and theoretical data regarding the design, characterization and analytical applications of a non-expensive, liquid-membrane ion-selective electrode for Pb2+ ions. The membrane is a solution of the active complex formed by Pb2+ ions with dibenzo-18-crown-6-ionophore (DB-[18]-C-6) extracted in propylene carbonate (PC). The successful application of the developed electrode for the determination of Pb2+ ions in aqueos solution samples by direct potentiometry and potentiometric titration is presented. For the presented analytical results, there are insignificant sys

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3

Shrager, R. I., and R. W. Hendler. "Processing and analysis of potentiometric data." Biophysical Journal 49, no. 3 (1986): 687–91. http://dx.doi.org/10.1016/s0006-3495(86)83695-5.

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4

Guagnellini, E., G. Spagliardi, G. Bernardi, and P. Stella. "Reliability of IL Monarch ion-selective electrode module for sodium, potassium, and chloride measurements." Clinical Chemistry 34, no. 4 (1988): 746–48. http://dx.doi.org/10.1093/clinchem/34.4.746.

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Abstract We evaluated the IL Monarch random-access centrifugal analyzer for measurement of Na+, K+, and Cl- by an indirect potentiometric method. For different concentrations of control material, the total precision (CV) ranged between 0.82% and 1.14% for the three electrolytes; linearity was acceptable within a range of 103 to 215 mmol/L for Na+, 1.6-15.25 mmol/L for K+, and 80-173 mmol/L for Cl-. Data correlated well with those by flame photometry for Na+ and K+ and with those by coulometry for Cl-, both for various biological materials--sera, urines, dialysis fluids--and commercial control

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5

Pleniceany, Maria, Marian Isvoranu, and Cezar Spinu. "Liquid membrane ion-selective electrodes for potentiometric dosage of coper and nickel." Journal of the Serbian Chemical Society 70, no. 2 (2005): 269–76. http://dx.doi.org/10.2298/jsc0502269p.

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This paper presents experimental and theoretical data regarding the preparation and characterization of three liquid-membrane electrodes, which have not been mentioned in the specialized literature so far. The active substances, the solutions of which in nitrobenzene formed the membranes on a graphite rod, are simple complex combinations of Cu(II) and Ni(II) ions with an organic ligand belonging to the Schiff base class: N-[2-thienylmethilidene]-2-aminoethanol (TNAHE). The Cu2+ -selective and Ni2+ -selective electrodes were used to determine the copper and nickel ions in aqueous solutions, bot

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6

Yao, Yao, Yibin Ying, and Jianfeng Ping. "Development of a Graphene Paper-Based Flexible Solid-Contact Lead Ion-Selective Electrode and its Application in Water." Transactions of the ASABE 62, no. 2 (2019): 245–52. http://dx.doi.org/10.13031/trans.12906.

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Abstract. A graphene paper-based flexible solid-contact ion-selective electrode (SC-ISE) was developed to detect lead ion sensitively. Graphene paper obtained via a simple vacuum filtration method was used as the electrode substrate for direct coating of an ion-selective membrane. The Nernstian slope of the prepared paper-based potentiometric sensor toward lead ion detection was demonstrated as 29.4 mV per decade. A detection limit as low as 2.5 × 10-7 mol L-1 was achieved. Reversed chronopotentiometry and water layer test revealed that the graphene paper-based SC-ISE possessed excellent poten

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7

Hassan, Saad S. M., and Mona A. Ahmed. "Polyvinyl Chloride Matrix Membrane Electrodes for Manual and Flow Injection Analysis of Chloroquine in Pharmaceutical Preparations." Journal of AOAC INTERNATIONAL 74, no. 6 (1991): 900–905. http://dx.doi.org/10.1093/jaoac/74.6.900.

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Abstract Two types of polyvinyl chloride (PVC) matrix membrane electrodes responsive to the antimalarial drug chloroquine have been constructed, electrochemically evaluated, compared, and used in pharmaceutical analysis. Type 1 is the classic PVC model with chloroquine-tetraphenylborate (TPB) sensor; Type 2 is a coated silver disk without internal filling solution. Both electrode types exhibited rapid linear potentiometric response to the logarithmic concentration of diprotonated chloroquine cation in the 10−1–10−6M range with calibration slopes 28-30 mV/concentration decade over the pH range

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8

Mohd Nusa, Fatin Najwa, Mohd Firdaus Abdullah, Samsul Setumin, Sheikh Mohd Firdaus, Adi Irfan Che Ani, and Norngainy Mohd Tawil. "Development of Microcontroller Based Potentiometric Transduction Circuit for a Continuous Fluid Level Sensor." Applied Mechanics and Materials 747 (March 2015): 379–83. http://dx.doi.org/10.4028/www.scientific.net/amm.747.379.

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This paper presents the development of microcontroller based potentiometric transduction circuit for a continuous fluid level sensor. The purpose system involved the integration between hardware and software subsystem. For hardware subsystem, the design of potentiometric circuit was tested with theoretical computation, simulation on Proteus VSM software and breadboard circuit. This finding was then used to develop interface for the analog-to-digital converter. For software subsystem, the water level indicator system has been developed using ATMEGA2560 by converting the output from potentiometr

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9

Maria, Pleniceanu, Isvoranu Maria, and Spînu Cezar. "New electrochemical sensors used for potentiometric determination of copper and nickel." Journal of Indian Chemical Society Vol. 79, Nov 2002 (2002): 884–86. https://doi.org/10.5281/zenodo.5847751.

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Faculty ofChemistry, University ofCraiova, A. I. Cuza 13, Romania E-mail : adychem@yahoo.com Fax : 40-51-1 97048 <em>Manuscript received 17 July 2001, revised 17 May 2002, accepted 12 June 2002</em> The paper presents the experimental and theoretical data regarding the preparation, characterization and analytical applications of four liquid-membrane electrodes. The active substances whose solutions in nitrobenzene have constituted the membranes on graphite rod, are mixed complex combinations of Cu<sup>II</sup> and Ni<sup>II</sup> ions with two Schiff base ligands <em>N</em>-[2- thienylmethylid

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10

Yperman, Jan, Robert Carleer, Guy Reggers, Jules Mullens, and Lucien Van Poucke. "Automation of Potentiometric Measurements: Determination of Water-Extractable Sodium in Bread Using a Sodium Ion Selective Electrode with Minimum Sample Preparation." Journal of AOAC INTERNATIONAL 76, no. 5 (1993): 1138–42. http://dx.doi.org/10.1093/jaoac/76.5.1138.

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Abstract Different automated potentiometric procedures for the determination of NaCI in bread have been investigated and evaluated. The results are compared with data from atomic absorption spectrophotometry (AAS). A continuous potentiometric Na+ determination using a sodium ion selective electrode (ISE) is superior to all other methods. The sodium content can be measured by a reliable, rapid, and inexpensive potentiometric measurement of a finely ground and dried bread sample, extracted in the measurement beaker, as an alternative to the conventional and time-consuming AAS procedure.

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11

Vladimirova, Nadezhda, Elena Puchkova, Dmitry Dar’in, Alexander Turanov, Vasily Babain, and Dmitry Kirsanov. "Predicting the Potentiometric Sensitivity of Membrane Sensors Based on Modified Diphenylphosphoryl Acetamide Ionophores with QSPR Modeling." Membranes 12, no. 10 (2022): 953. http://dx.doi.org/10.3390/membranes12100953.

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While potentiometric, plasticized membrane sensors are known as convenient, portable and inexpensive analytical instruments, their development is time- and resource-consuming, with a poorly predictable outcome. In this study, we investigated the applicability of the QSPR (quantitative structure–property relationship) method for predicting the potentiometric sensitivity of plasticized polymeric membrane sensors, using the ionophore chemical structure as model input. The QSPR model was based on the literature data on sensitivity, from previously studied, structurally similar ionophores, and it h

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12

H�zi, J., L. Daruh�zi, O. Pint�r, and Zs Szak�ly. "Critical comparison of evaluation methods of potentiometric titration data using a microcomputer-controlled automatic potentiometric titration system." Mikrochimica Acta 89, no. 1-6 (1986): 379–88. http://dx.doi.org/10.1007/bf01207330.

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13

Stong, John D. "A computer-controlled potentiometric/spectrophotometric titrator." Journal of Automatic Chemistry 10, no. 2 (1988): 95–100. http://dx.doi.org/10.1155/s1463924688000185.

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A laboratory computer controlled potentiometric titrator interfaced to a diode array spectrophotometer is described. The titrator consists of widely used, commercially available components; therefore, major attention is given to modes of interconnection and software implementation in data format and system control. Replicate potentiometric titrations of glycines gave a relative standard deviation in titre of 1.035% and a relative standard deviation in pH of 0.745%. Replicate spectrophotometric titrations of bromophenol blue were analysed at three wavelengths to yield pKa= 3.898 ± 0.075 (1.9% r

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14

Pálla, Tamás, Károly Mazák, Dania Mohammed Alkhazragee, György Tibor Balogh, Béla Noszál, and Arash Mirzahosseini. "Comparison of Orthogonal Determination Methods of Acid/Base Constants with Meta-Analysis." International Journal of Molecular Sciences 25, no. 23 (2024): 12727. http://dx.doi.org/10.3390/ijms252312727.

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The accurate determination of acid/base constants (proton dissociation constants—pKa, or equivalently protonation constants—logK) is essential for the physicochemical characterization of new molecules, especially in drug design and development, as these parameters thoroughly influence the pharmacokinetics and pharmacodynamics of drug action. While pH/potentiometric titration remains the gold standard method for determining acid/base constants, spectroscopic techniques—particularly nuclear magnetic resonance spectroscopy (as NMR/pH titrations)—have emerged as powerful alternatives for specific

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15

Mustafa, S., A. Naeem, N. Rehana, and H. Y. Samad. "Cation-Exchange Properties of Aluminium(III) Phosphate." Adsorption Science & Technology 13, no. 4 (1996): 261–79. http://dx.doi.org/10.1177/026361749601300404.

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Potentiometric titrations of aluminium(III) phosphate have been performed in the presence of aqueous electrolyte solutions containing Cu2+, Zn2+, Ni2+ and K+ ions as a function of the concentration of the latter, the pH and the temperature. The sorption of Zn2+ ions has also been studied and the data for metal ion sorption shown to correlate with the Potentiometric titration data, indicating that the process responsible for metal ion uptake is ion exchange. The pKa value of the exchanger and its thermodynamic parameters have been evaluated.

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16

Miraminzoda, Farida, Mubashirhon Rakhimova, Erkin Faizullozoda, Jahongul Davlatshoeva, and Gulruhsor Bobonazarzoda. "Effect of citric acid concentration on its dissociated and non-dissociated forms." From Chemistry Towards Technology Step-By-Step 6, no. 1 (2025): 107–11. https://doi.org/10.52957/2782-1900-2025-6-1-107-111.

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The authors have studied the acid-base properties of citric acid by potentiometric titration at a temperature of 298 K and concentrations of CH3Cit(OH) of 0.01 and 0.02 mol/L. The results of potentiometric titration depend on the concentration of substances and the time of setting the equilibrium pH value of the titrated solution. The potentiometric method determined three carboxyl groups of citric acid corresponding to pKa1, pKa2, and pKa3. The values of citric acid dissociation constants for 0.02 mol/L concentration are 2.75, 4.45, and 5.82. The authors constructed the distribution diagrams

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17

Decock, Patrick, and Bibudhendra Sarkar. "Analytical potentiometric data analyses of metal–ligand equilibria by microcomputer. A general procedure for minimizing potential sources of errors and a fast linear-scaled least-squares algorithm." Canadian Journal of Chemistry 65, no. 12 (1987): 2798–803. http://dx.doi.org/10.1139/v87-465.

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Analytical potentiometry is a powerful technique to investigate multiple species in solution and their formation constants. However, there have been some difficulties in this method resulting primarily from the theoretical approach. In this paper we critically examined them and improvements have been implemented successfully. Suitable experimental designs are adapted and preliminary computation of potentiometric data are performed to minimize potential sources of errors. Criteria are proposed to choose the best set of titration curves. A correction is introduced to partially minimize the error

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18

Yehia, Ali M., Soad E. Abo-Elhoda, Nagiba Y. Hassan, and Amr M. Badawey. "Experimental validation of a computationally-designed tiotropium membrane sensor." New Journal of Chemistry 42, no. 19 (2018): 16354–61. http://dx.doi.org/10.1039/c8nj03507e.

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19

Türkel, Naciye. "Study of Metal-1,10-Phenanthroline Complex Equilibria by Potentiometric Measurements." ISRN Analytical Chemistry 2012 (November 3, 2012): 1–5. http://dx.doi.org/10.5402/2012/345684.

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The interaction of Sc(III), Y(III), and La(III) ions with 1,10-phenanthroline (Phen) has been investigated, using the potentiometric method at 25 and M KNO3. Collected potentiometric data were processed by the “BEST” software program to establish the complexation model for each system. SPE software program was used to evaluate the concentration distributions of the species formed in solution. The stability constants for the binary complexes increased as the ionic radii of the metal cations decreased.

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20

Chen, Jian-Feng, Yuan-Xian Xia, and Gregory R. Choppin. "Derivative Analysis of Potentiometric Titration Data To Obtain Protonation Constants." Analytical Chemistry 68, no. 22 (1996): 3973–78. http://dx.doi.org/10.1021/ac960138t.

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21

Belikova, Valeria, Vitaly Panchuk, Evgeny Legin, Anastasia Melenteva, Andrey Legin, and Dmitry Kirsanov. "Topological Data Analysis of Potentiometric Multisensor Measurements in Treated Wastewater." Journal of Analysis and Testing 2, no. 4 (2018): 291–98. http://dx.doi.org/10.1007/s41664-018-0066-4.

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22

Tran The, Nga, and Anh Nguyen Thi Mai. "DETERMINING THE THERMODYNAMIC DISSOCIATION CONSTANTS OF 5-BROMO-6,7-DIHYDROXY-N-METHYL-3-SULFOQUINOLINE IN AQUEOUS SOLUTION AT 25 OC BY POTENTIOMETRIC METHOD." Journal of Science Natural Science 67, no. 2 (2022): 103–9. http://dx.doi.org/10.18173/2354-1059.2022-0027.

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In this report, the thermodynamic dissociation constants of 5-bromo-6,7- dihydroxy-N-methyl-3-sulfoquinoline (signed H2BDMS) acid were firstly determined in the aqueous solution using potentiometric titration at (25.0 ± 0.1) oC in the ionic medium of 0.10 M KCl solution. This new acid is a compound containing the quinoline ring that may be applied in many branches of chemistry, biology, and medicine. The pKa values of H2BDMS acid which were determined by the potentiometric method are pKa1 = 2.79 ± 0.02 and pKa2 = 7.80 ± 0.06. To increase the precision and accuracy of the results, the pKa value

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23

Жеребцов, С. И., Н. В. Малышенко, К. М. Шпакодраев, К. С. Вотолин, and З. Р. Исмагилов. "POTENTIOMETRIC TITRATING OF HUMIC FRACTIONS." Koks i khimiya, no. 8 (November 29, 2023): 25–29. http://dx.doi.org/10.52351/00232815_2023_08_25.

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Из бурого угля Тисульского месторождения Канско-Ачинского бассейна выделены гуминовые, гиматомелановые, гумусовые и фульвокислоты. Полученные образцы охарактеризованы с применением технического и элементного анализов. Представлены данные определения содержания функциональных групп методом потенциометрического титрования. Показано, что для всех исследуемых кислот содержание карбоксильных и гидроксильных групп изменяется в ряду: Ar–OH > Ar–COOH > Alk–COOH. Humic, hymatomelanic, humus and fulvic acids have been isolated from the brown coal of the Tisulsky deposit of the Kansk-Achinsk basin.

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24

Gabryel-Skrodzka, Malwina, Martyna Nowak, Klaudia Stachowiak, Michal Zabiszak, Kazuma Ogawa, and Renata Jastrzab. "The Influence of pH on Complexation Process of Copper(II) Phosphoethanolamine to Pyrimidine Nucleosides." Materials 14, no. 15 (2021): 4309. http://dx.doi.org/10.3390/ma14154309.

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The influence of pH on the complex formation of phosphoethanolamine and pyrimidine nucleosides (uridine, cytidine and thymidine) with copper(II) ions was studied. All investigations were performed in aqueous solution. The overall stability constants of the complexes and non-covalent compounds were obtained using the potentiometric method with computer calculation of the data. Moreover, equilibrium constants of the reaction were determined. The mode of coordination was obtained using spectroscopic methods. Analysis of the potentiometric and spectroscopic data confirmed the involvement and effec

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25

Beljaars, Paul R., and William Horwitz. "Comparison of the Volhard and Potentiometric Methods for the Determination of Chloride in Meat Products: Collaborative Study." Journal of AOAC INTERNATIONAL 68, no. 3 (1985): 480–84. http://dx.doi.org/10.1093/jaoac/68.3.480.

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Abstract A collaborative study of the determination of chloride in meat products was conducted by the International Organization for Standardization (ISO) to compare the ISO 1841 method (Volhard titration) with the FAO/WHO Codex Alimentarius Committee method (potentiometric titration). Five canned luncheon meat products containing 0.25-2.0% sodium chloride at 4 different spiking levels were analyzed by 11 laboratories. The data were analyzed by ISO statistics (ISO 5725) and by AOAC statistics (Youden-Steiner), the major differences being in the rejection of outliers and in the statement of pre

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26

Aktaş, Hakan, and Pekcan Ertokuş. "Potentiometric determination of ibuprofen, indomethacin and naproxen using an artificial neural network calibration." Journal of the Serbian Chemical Society 73, no. 1 (2008): 87–95. http://dx.doi.org/10.2298/jsc0801087a.

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In this study, three anti-inflammatory agents, namely ibuprofen, indomethacin and naproxen, were titrated potentiometrically using tetrabutyl?ammonium hydroxide in acetonitrile solvent under a nitrogen atmosphere at 25?C. MATLAB 7.0 software was applied for data treatment as a multivariate calibration tool in the potentiometric titration procedure. An artificial neural network (ANN) was used as a multivariate calibration tool in the potentiometric titration to model the complex non-linear relationship between ibuprofen, indomethacin and naproxen concentrations and the millivolt (mV) of the sol

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27

Trajkovska Bojadjiska, Elena, Hrisanta Godzo, Jelena Acevska, Natalija Nakov, Aneta Dimitrovska, and Katerina Brezovska. "Evaluation of measurement uncertainty after optimization of the method for potentiometric titration of glycine." Macedonian Pharmaceutical Bulletin 68, no. 1 (2023): 43–52. http://dx.doi.org/10.33320/maced.pharm.bull.2022.68.01.005.

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Accuracy and repeatability of the results obtained by potentiometric determination mostly depend on the stoichiometric ratio between the quantity of titrant used and the quantity of sample to be examined. During the optimization of the method, care should be taken to adjust the sample amount to provide suitable volume of titrant, in order to avoid the titration error with consumption above 90% of the total burette volume. In this study suitable approach for optimization of method for potentiometric titration of glycine with 0.1 M perchloric acid was demonstrated, followed by evaluation of meas

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28

Vladimirova, Nadezhda, Valery Polukeev, Julia Ashina, Vasily Babain, Andrey Legin, and Dmitry Kirsanov. "Prediction of Carbonate Selectivity of PVC-Plasticized Sensor Membranes with Newly Synthesized Ionophores through QSPR Modeling." Chemosensors 10, no. 2 (2022): 43. http://dx.doi.org/10.3390/chemosensors10020043.

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Developing a potentiometric sensor with required target properties is a challenging task. This work explores the potential of quantitative structure-property relationship (QSPR) modeling in the prediction of potentiometric selectivity for plasticized polymeric membrane sensors based on newly synthesized ligands. As a case study, we have addressed sensors with selectivity towards carbonate—an important topic for environmental and biomedical studies. Using the logKsel(HCO3−/Cl−) selectivity data on 40 ionophores available in literature and their substructural molecular fragments as descriptors,

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29

Guérard, François, Yong-Sok Lee, Raphaël Tripier, Lawrence P. Szajek, Jeffrey R. Deschamps, and Martin W. Brechbiel. "Reply to the ‘Comment on “Investigation of Zr(iv) and 89Zr(iv) complexation with hydroxamates: progress towards designing a better chelator than desferrioxamine B for immuno-PET imaging”’ by A. Bianchi and M. Savastano, Chem. Commun., 2020, 56, D0CC01189D." Chemical Communications 56, no. 83 (2020): 12667–68. http://dx.doi.org/10.1039/d0cc03594g.

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The relevance of simplified models used for potentiometric data interpretation is discussed in the context of radiolabelling chemistry (herein the complexation of a radiometal, <sup>89</sup>Zr, by a ligand L).

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H., A. SHEHATA, H. EL-NAKHILY S., and M. EMARA M. "Thermodynamics of Ionisation and Complex Formation of Pyrocatechol Violet with Copper(II), Nickel(II) and Zinc(II) using Potentiometric Technique." Journal of Indian Chemical Society Vol. 70, Mar 1993 (1993): 193–96. https://doi.org/10.5281/zenodo.5913512.

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Department of Chemistry, Faculty of Science, AI-Azhar University, Nasr City, Cairo-Egypt <em>Manuscript received 23 April 1991, revised 13 October 1992, accepted 7 January 1993</em> The complexation of copper, zinc and nickel with pyrocatechol violet (PCV) was investigated using potentiometric method. The ionisation of pure PCV and the formation constants of metal-PCV complexes are obtained from potentiometry at five temperatures ; 25, 30. 35, 40 and 45° in different aqueous solutions of fixed ionic strengths (<em>I</em>= 0.04. 0.07, 0.11 and 0.15 mol dm<sup>-3</sup> ) using NaCI

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Mustafa, S., A. Naeem, N. Rehana, and T. Hussain. "Exchange of Some Divalent Metal Cations and Their Effect on the Dissociation of Iron(III) Phosphate." Adsorption Science & Technology 13, no. 4 (1996): 241–60. http://dx.doi.org/10.1177/026361749601300403.

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Potentiometric titrations of iron(III) phosphate have shown an apparently weak monobasic acid behaviour towards alkali, alkaline earth and divalent transition metal ions. The selectivity sequence and dissociation of the exchanger was found to increase in the order Cu2+ > Zn2+ > Ni2+ > Ca2+ > K+. The dissociation constants of iron(III) phosphate have been determined from Potentiometric titration data in the temperature range 303–323 K. In addition, the exchange of Cu2+, Zn2+ and Co2+ on iron(III) phosphate and the effect of these ions on dissociation were also studied as a function

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32

Piasecki, Wojciech, and Karolina Lament. "Application of Potentiometric and Electrophoretic Measurements to Evaluate the Reversibility of Adsorption of Divalent Ions from a Solution on Titanium Dioxide." Molecules 29, no. 3 (2024): 555. http://dx.doi.org/10.3390/molecules29030555.

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The adsorption of divalent ions on metal oxides is controlled by the pH of a solution. It is commonly assumed that this is a reversible process for pH changes. However, there are reports that the sorption of ions on oxides may not be reversible. To verify this, we used potentiometric titration, ion-selective electrodes (ISEs), and electrokinetic measurements to examine the reversibility of the adsorption of hydrogen ions and three metal ions (Ca2+, Cu2+, and Fe2+) on TiO2. The ferrous ion was used as a reference because its adsorption is entirely irreversible. The surface charge determined by

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33

Laughner, Jacob I., Fu Siong Ng, Matthew S. Sulkin, R. Martin Arthur, and Igor R. Efimov. "Processing and analysis of cardiac optical mapping data obtained with potentiometric dyes." American Journal of Physiology-Heart and Circulatory Physiology 303, no. 7 (2012): H753—H765. http://dx.doi.org/10.1152/ajpheart.00404.2012.

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Optical mapping has become an increasingly important tool to study cardiac electrophysiology in the past 20 years. Multiple methods are used to process and analyze cardiac optical mapping data, and no consensus currently exists regarding the optimum methods. The specific methods chosen to process optical mapping data are important because inappropriate data processing can affect the content of the data and thus alter the conclusions of the studies. Details of the different steps in processing optical imaging data, including image segmentation, spatial filtering, temporal filtering, and baselin

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34

GILLI, WAYNE J., and IOANNIS LAIOS. "Low-Level Potentiometric Data Acquistion System for an Ionized Calcium Reference Method." Journal of Clinical Engineering 19, no. 5 (1994): 395. http://dx.doi.org/10.1097/00004669-199409000-00018.

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35

Gonzalez, A. "A computational method for approximate evaluation of ionization constants from potentiometric data." Talanta 35, no. 4 (1988): 249–52. http://dx.doi.org/10.1016/0039-9140(88)80080-8.

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36

Cini, Renzo, Antonio Sabatini, Alberto Vacca, and Fabrizio Zanobini. "Metal complexes of propane-1,2,3-triamine. Potentiometric and calorimetric investigations." Canadian Journal of Chemistry 75, no. 2 (1997): 212–19. http://dx.doi.org/10.1139/v97-025.

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The complexes formed by the ions Co2+, Ni2+, Cu2+, and Zn2+ with the ligand propane-1,2,3-triamine (L1) in 0.15 mol dm−3 aqueous NaCl at 25 °C have been studied by potentiometry and calorimetry (ligand to metal molar ratio, 1–3; pH range from 3.0 to 6.5–11.0). Stability constants have been obtained from potentiometric data by means of the least-squares program HYPERQUAD for the following species: [M(L1)]2+ and [MH(L1)]3+ for all four metal cations; [M(L1)2]2+ and [MH(L1)2]3+ for Ni2+, Cu2+, and Zn2+; [MH2(L1)2]4+ for Ni2+ and Cu2+; and [M(OH)(L1)]+ for Cu2+ only. Stabilities increase in the or

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37

Saladi, Rama Krishna, Shyamala Pulipaka, and Satyanarayana Atreyapu. "Chemical Modelling Potentiometric Study on the Complex Formation of Ditopic Sebacic Acid Dihydrazide with Co2+ and Ni2+in Aqueous Medium." Research Journal of Chemistry and Environment 27, no. 12 (2023): 180–86. http://dx.doi.org/10.25303/2712rjce1800186.

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Binary proton-ligand as well as metal-ligand equilibria of Sebacicdicarboxylic acid dihydrazide (L) with Co2+and Ni2+were studied by pH-potentiometric method at 30 0C and I=0.1M (NaCl). Sebacic acid dihydrazide is an aliphatic polydentate ditopic ligand that can bind metal ions through two hydrazide groups present at the ends of a long linear –(CH2)8- hydrocarbon chain. This enables the ligand to form both mononuclear and binuclear species. The potentiometric data acquired were analysed chemometrically using the Miniquad-75 program. The complexes that converged include protonated (MLH, ML2H an

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38

Powell, HKJ, and RM Town. "Aluminum(III)-Malonate Equilibria: a Potentiometric Study." Australian Journal of Chemistry 46, no. 5 (1993): 721. http://dx.doi.org/10.1071/ch9930721.

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The aluminium(III)-malonic acid (H2L) equilibria have been studied by potentiometric titration in aqueous solution at 25°C (I = 0.10 M KCl ). Data were consistent with the formation of simple binary complexes AlL + (log K1 = 6.711), AlL2- (log K2 = 4.815) and AlL33- (logβ3 = 14.104) in the pH range 2.2-5.5. There was also evidence for a minor species AlL2(OH)2- at pH > 5.8 for solutions with [Al3+]:[LH2] < 3.0 (log KD= -6.68). The protonation constants determined for malonic acid were log K1 = 5.43 and log K2 = 2.60 (corrected for K+ ion pairing).

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Samardžić, Mirela, Mateja Peršić, Aleksandar Széchenyi, Marija Jozanović, Iva Pukleš, and Mateja Budetić. "Development of the New Sensor Based on Functionalized Carbon Nanomaterials for Promethazine Hydrochloride Determination." Sensors 23, no. 5 (2023): 2641. http://dx.doi.org/10.3390/s23052641.

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Promethazine hydrochloride (PM) is a widely used drug so its determination is important. Solid-contact potentiometric sensors could be an appropriate solution for that purpose due to their analytical properties. The aim of this research was to develop solid-contact sensor for potentiometric determination of PM. It had a liquid membrane containing hybrid sensing material based on functionalized carbon nanomaterials and PM ions. The membrane composition for the new PM sensor was optimized by varying different membrane plasticizers and the content of the sensing material. The plasticizer was sele

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Lakshminarayana, Shanthala, Revathy Perumalsamy, Chenyun Pan, Sungyong Jung, Hoon-Ju Chung, and Hyusim Park. "A CMOS Switched Capacitor Filter Based Potentiometric Readout Circuit for pH Sensing System." Journal of Low Power Electronics and Applications 15, no. 1 (2025): 3. https://doi.org/10.3390/jlpea15010003.

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This work presents a potentiometric readout circuit for a pH-sensing system in an oral healthcare device. For in vivo applications, noise, area, and power consumption of the readout electronics play critical roles. While CMOS amplifiers are commonly used in readout circuits for these applications, their applicability is limited due to non-deterministic noises such as flicker and thermal noise. To address these challenges, the Correlated Double Sampler (CDS) topology is widely employed as a sampled-data circuit for potentiometric readout, effectively eliminating DC offset and drift, thereby red

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Baulin, V. E., G. S. Tsebrikova, D. V. Baulin, and Y. F. Al Ansary. "1,5-bis[2-(dioxyphosphoryl)-4-ethylphenoxy]-3-oxapentane and its Analogs as Promising Organic Ligands for Copper(II) Binding s." Biomedical Chemistry: Research and Methods 1, no. 3 (2018): e00043. http://dx.doi.org/10.18097/bmcrm00043.

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The dissociation and complexation ability toward Cu(II) of acidic type phosphoryl-containing podands – tetrabasic 1,5-bis[2-(dioxyphosphoryl)-4-ethylphenoxy]-3-oxapentane (L1), dibasic – 1,5-bis[2-(ethoxyhydroxyphosphoryl)-4-ethylphenoxy]-pentane (L2) and also of their carboxylic analogue dibasic 1,5-bis[2-(oxycarbonylphenoxy)]-3-oxapentane (L3) were investigated by spectrophotometric, conductometric and potentiometric methods in water in the presence 5% of dimethyl formamide. Spectrophotometric and conductometric titration data provided evidence for formation of 1:1 (M:L) complexes. The disso

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42

Pusz, Janusz, Wojciech Zapała, and Bogdan Papciak. "Investigations of selected properties of pharmacologically active compounds by chromatographic and potentiometric methods on the chrysin example." Polish Journal of Chemical Technology 10, no. 1 (2008): 41–44. http://dx.doi.org/10.2478/v10026-008-0010-x.

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Investigations of selected properties of pharmacologically active compounds by chromatographic and potentiometric methods on the chrysin example The RP-TLC method was used to determine the dissociation constant of chrysin (5,7-dihydroxyflavone) in methanol-aqueous (1:1 v/v) solutions. In this method the pK value was quantified on the basis of retention data and a retention model. The accuracy of determining the model parameters was analysed using the following statistical criteria: the sum of the squared differences between the experimental and theoretical data, approximation of standard devia

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Qayoom, Amtul, Syed Arif Kazmi, and Saeeda Nadir Ali. "Turmeric Powder as a Natural Heavy Metal Chelating Agent: Surface Characterisation." Pakistan Journal of Scientific & Industrial Research Series A: Physical Sciences 60, no. 1 (2017): 1–8. http://dx.doi.org/10.52763/pjsir.phys.sci.60.1.2017.1.8.

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The present study was conducted to investigate surface properties of turmeric in order to evaluateits detoxification potential and ability to sequester toxic metals ions. Scanning Electron Microscopy (SEM),Energy Dispersion Spectroscopy (EDS), Infra-Red (IR) spectroscopy and potentiometric titrations wereemployed for characterisation of the surface of turmeric powder. Spectroscopic studies revealed that thesurface of turmeric powder was porous mainly composed of polymeric -OH , -NH , -CH2 , -COO and-OH groups of polysaccharides. From potentiometric titrations and modelling of batch titration d

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Tataeva, S. D., R. Z. Zeynalov, and K. E. Magomedov. "Potentiometric sensor for lead ions determination." Аналитика и контроль 25, no. 3 (2021): 205–11. http://dx.doi.org/10.15826/analitika.2021.25.3.002.

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One of the sensitive and inexpensive methods used for the analysis of water bodies is the ionometry, the development of which is associated with the introduction of new ion-selective electrodes into the practice of potentiometric analysis. An optimized composition of the membrane for the manufacturing of a zinc-selective electrode based on polyvinyl chloride modified with 2-mercaptobenzthiazole (MPVC) is proposed with the following ratio of ingredients (in wt. %): Polyvinyl chloride - 31.7; dioctyl sebacate - 66.3; potassium tetra-p-chlorophenylborate - 0.5; MPVH - 1.5. The working range of pH

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Partanen, Jaakko I., Pekka M. Juusola, Pentti O. Minkkinen, and Virginie Verraes. "Determination of the second stoichiometric dissociation constants of glycine in aqueous sodium or potassium chloride solutions at 298.15 K." Canadian Journal of Chemistry 81, no. 12 (2003): 1462–70. http://dx.doi.org/10.1139/v03-154.

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Equations were determined for the calculation of the second stoichiometric (molality scale) dissociation constant, Km2, of glycine, in aqueous NaCl and KCl solutions at 298.15 K, from the thermodynamic dissociation constant, Ka2, of this acid and the ionic strength, Im, of the solution. The ionic strength of the solutions considered in this study is determined mostly by the salt alone, and the equations for Km2 were based on the single-ion activity coefficient equations of the Hückel type. New data measured by potentiometric titrations in a glass electrode cell were used in the estimation of t

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Meloun, Milan, Zuzana Ferenčíková, Lucie Netolická, and Aleš Vrána. "The thermodynamic dissociation constant of naphazoline by the regression analysis of potentiometric data." Open Chemistry 9, no. 1 (2011): 66–74. http://dx.doi.org/10.2478/s11532-010-0117-9.

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AbstractThe mixed dissociation constant of naphazoline is determined at various ionic strengths I [mol dm−3] in the range of 0.01 to 0.26 and at temperatures of 25°C and 37°C using ESAB and HYPERQUAD regression analysis of the potentiometric titration data. A strategy of efficient experimentation is proposed in a protonation constant determination, followed by a computational strategy for the chemical model with a protonation constant determination. Two group parameters, L 0 and H T were ill-conditioned in the model and their determination is therefore uncertain. These group parameters, L 0 an

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Mercê, Ana L. R., Erika Fernandes, Antonio S. Mangrich, M. R. Sierakowski, and Bruno Szpoganicz. "Fe (III) - Galactomannan Solid and Aqueous Complexes: Potentiometric, EPR Spectroscopy and Thermal Data." Journal of the Brazilian Chemical Society 12, no. 6 (2001): 791–98. http://dx.doi.org/10.1590/s0103-50532001000600017.

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Høyer, Boy, Hans Jørgen Skov, and Lars Kryger. "Computerized system with a hard-wired data-acquisition unit for potentiometric stripping analysis." Analytica Chimica Acta 188 (1986): 205–17. http://dx.doi.org/10.1016/s0003-2670(00)86044-4.

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Santos, Eduarda B. H., Valdemar I. Esteves, João P. C. Rodrigues, and Armando C. Duarte. "Humic substances' proton-binding equilibria: assessment of errors and limitations of potentiometric data." Analytica Chimica Acta 392, no. 2-3 (1999): 333–41. http://dx.doi.org/10.1016/s0003-2670(99)00227-5.

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Maslarska, Vania, Jasmina Tencheva, and Omortag Budevsky. "New approach in the treatment of data from an acid–base potentiometric titration." Analytical and Bioanalytical Chemistry 375, no. 2 (2002): 217–22. http://dx.doi.org/10.1007/s00216-002-1671-6.

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