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Journal articles on the topic 'Potentiometric method'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Gerasimova, Elena, Elena Gazizullina, Sofya Kolbaczkaya, and Alla Ivanova. "The Novel Potentiometric Approach to Antioxidant Capacity Assay Based on the Reaction with Stable Radical 2,2′-diphenyl-1-picrylhydrazyl." Antioxidants 11, no. 10 (2022): 1974. http://dx.doi.org/10.3390/antiox11101974.

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For the first time, new possibilities of using the DPPH• as a signal-forming oxidant molecule with potentiometric detection are shown. The CV method confirmed the presence of a quasi-reversible potential-determining system DPPH•/DPPH-H under experimental conditions. This fact makes it possible to use DPPH• as the model of the oxidizing agent for obtaining an analytical signal by the potentiometry method. The potentiometric approach makes it possible to obtain the value of the Nernst slope and the antioxidant capacity in one experiment. It consists of an antioxidant supplement and two consecuti

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2

Zimmermann, Peter, Andreas Weltin, Gerald Urban, and Jochen Kieninger. "Active Potentiometry for Dissolved Oxygen Monitoring with Platinum Electrodes." Sensors 18, no. 8 (2018): 2404. http://dx.doi.org/10.3390/s18082404.

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Potentiometric oxygen monitoring using platinum as the electrode material was enabled by the combination of conventional potentiometry with active prepolarization protocols, what we call active potentiometry. The obtained logarithmic transfer function is well-suited for the measurement of dissolved oxygen in biomedical applications, as the physiological oxygen concentration typically varies over several decades. We describe the application of active potentiometry in phosphate buffered salt solution at different pH and ion strength. Sensitivity was in the range of 60 mV/dec oxygen concentration

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3

Izzati, Izzati, Suheryanto Suheryanto, and Poedji Loekitowati Hariani. "Development of a Concentration Cell Potentiometric Method for Fe2+ and Fe3+ Speciation." Indonesian Journal of Fundamental and Applied Chemistry 8, no. 3 (2023): 115–19. http://dx.doi.org/10.24845/ijfac.v8.i3.115.

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The speciation of Fe2+ and Fe3+ iron ions using the concentration cell potentiometric method has been developed. The determination and speciation of metals that have been used include potentiometry using comparison electrodes, selective ion electrodes, and voltammetry. The concentration cell potentiometric method has the advantages of simple equipment, the use of common metal electrodes, high selectivity, and relatively low detection limits. The method validation results for Fe2+ and Fe3+ ion speciation was LOD: Fe2+ 0.22 mg/L and Fe3+ 0.29, LOQ: Fe2+ 0.92 mg/L and Fe3+ 0.01 mg/L; precision (1

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4

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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5

Lenar, Nikola, Robert Piech, and Beata Paczosa-Bator. "Poly(3,4-ethylenedioxythiophene) and Poly(3-octylthiophene-2,5-diyl) Molecules as Composite Transducers in Potentiometric Sensors—Synthesis and Application." International Journal of Molecular Sciences 25, no. 22 (2024): 12381. http://dx.doi.org/10.3390/ijms252212381.

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The aim of this paper is to investigate the influence of the molecules of conducting polymers on the properties of potentiometric sensors. Two conducting polymers, poly(3-octylthiophene-2,5-diyl) and poly(3,4-ethylene-1,4-dioxythiophene), were compared in the context of the design of ion-selective electrodes. This study offers a comparison of the most popular conducting polymers in the context of the design of potentiometric sensors. Firstly, the properties of both materials, such as their microstructure, electrical performance, wettability, and thermic properties, were examined. Subsequently,

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6

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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7

Sołtysik, Barbara. "A quick method to determine the content of sulfates in silicic and aluminosilicate fillers." Polish Journal of Chemical Technology 9, no. 1 (2007): 33–35. http://dx.doi.org/10.2478/v10026-007-0009-8.

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A quick method to determine the content of sulfates in silicic and aluminosilicate fillers The paper presents the possibility of using barium-selective electrode to a potentiometric determination of sulfates in silicic and aluminosilicate fillers. The results of sulfates potentiometric titration in silicic and aluminosilicate fillers are described. A statistical interpretation of the results was carried out. The recommended method is based on the end-point detection of sulfates potentiometric titration in hydro-alcoholic medium by means of barium chlorate(VII) titrant. The potentiometric titra

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8

Odyakov, V. F., E. G. Zhizhina, and K. I. Matveev. "New potentiometric method for vikasol determination." Pharmaceutical Chemistry Journal 30, no. 1 (1996): 55–59. http://dx.doi.org/10.1007/bf02218931.

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9

Gottardi, Waldemar, and Jörg Pfleiderer. "Redox-iodometry: a new potentiometric method." Analytical and Bioanalytical Chemistry 383, no. 4 (2005): 721–22. http://dx.doi.org/10.1007/s00216-005-0100-z.

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10

Gottardi, Waldemar, and Jörg Pfleiderer. "Redox-iodometry: a new potentiometric method." Analytical and Bioanalytical Chemistry 382, no. 5 (2005): 1328–38. http://dx.doi.org/10.1007/s00216-005-3247-8.

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11

Borisov, A. F., M. M. Bun'kov, and N. A. Smirnova. "Potentiometric method of studying argillaceous materials." Glass and Ceramics 47, no. 5 (1990): 168–71. http://dx.doi.org/10.1007/bf00677820.

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12

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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13

Rajkovic, Milos, Ivana Sredovic, and Zorana Miloradovic. "Comparison of different methods for determination of sodium chloride in cheese." Journal of Agricultural Sciences, Belgrade 55, no. 1 (2010): 65–77. http://dx.doi.org/10.2298/jas1001065r.

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The content of NaCl (weight fraction of Cl-ions, in %) was analysed in different cheeses, which were bought in supermarkets, and made by domestic manufacturers. Sodium chloride in cheese samples was analysed after the extraction of chloride by nitric acid solution. Concentration of chloride ions was potentiometricly determined, with the chloride selective electrode and titrimetricly by Volhard method. According to the results in the analysis of the content of NaCl in %, by different methods it was determined that the share of NaCl in % ranged from 0.66 to 4.43% (determined by potentiometric ro

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14

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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15

Kholifa, Mulik, Tri Mulyono, and Yeni Maulidah Muflihah. "Simultaneous Determination of Magnesium (Mg2+) and Ammonium (NH4+) by Flow Injection Analysis." Jurnal ILMU DASAR 19, no. 1 (2018): 1. http://dx.doi.org/10.19184/jid.v19i1.5483.

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An automatic method for the simultaneous determination of magnesium and ammoniun by flow injection analysis is described. This analysis used two detectors, potentiometry and spectrophotometry, for the determination of magnesium and ammonium simultaneously. Potentiometric detectors are used to detect ammonium ions, whereas spectrophotometer detectors are used to detect the presence of magnesium ions. The performance of the FIA system includes linear range linearity, limit of detection, sensitivity, reproducibility and recovery test. Spectrophotometry FIA showed good performance with several cri

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16

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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17

N., JAYASKEE, and MOHANADAS C. "Dichlorobarbituric Acid as an Oxidimetric Titrant : Direct Potentiometric and Visual Titrations in Aqueous Acetic Acid Medium." Journal of Indian Chemical Society Vol. 68, Aug 1991 (1991): 455–57. https://doi.org/10.5281/zenodo.5990651.

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Regional Chemical Examiner's Laboratory, Kozhikode-8 Department of Chemistry, St. Joseph's College, Bangalore-560 001 <em>Manuscript received 16 November 1990, revised 23 May 1991, accepted 25 July 1991</em> A stable oxidimetric titrant 1,3 dichloro-5,5-diethylbarbltutrlc acid (DCBA) in aqueous acetic acid Is proposed for the direct potentiometric and visual titrations of a variety of simple and complex reductants. The reductants studied include antimony(III), iron(II), bexacyanoferrate(II), sulphite ascorbic acid, hydroquinone. bydrazine, Lenzhydrazide, isoniazid, semicarbazide. thiou

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18

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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19

LUTWICK, GERALD W., GORDON R. WEBSTER, and BYRON KRATOCHVIL. "A COMPARISON OF THREE METHODS FOR DETERMINING CALCIUM ION ACTIVITY IN SOIL SOLUTIONS." Canadian Journal of Soil Science 68, no. 2 (1988): 433–41. http://dx.doi.org/10.4141/cjss88-040.

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Calcium ion activity, (Ca2+), in 37 soil solutions was determined using species calculation, potentiometric (ion selective electrode), and colorimetric (tetramethylmurexide) methods. Agreement among the three estimates of (Ca2+) was tested by comparing the potentiometric and colorimetric methods to the species calculation method. Good agreement was observed between (Ca2+) estimates using the potentiometric and species calculation methods. Percent relative error between the two methods was less than 5% for 76% of the soil extracts and less than 10% for 85% of the soil extracts. Differences are

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20

Sakač, N. "Direct Potentiometric Method for Human Stress Determination." Chemical and Biochemical Engineering Quarterly 29, no. 3 (2015): 315–21. http://dx.doi.org/10.15255/cabeq.2015.2175.

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21

Derouicha, Matmour, Zohra Hadjadj Aoul Fatima, and Houari Toumi. "Comparative Utilization of Potentiometric Titration and HPLC Methods for Content Determination of Propranolol Raw Material." Pharmaceutical and Chemical Journal 6, no. 1 (2019): 49–52. https://doi.org/10.5281/zenodo.13931555.

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This study describes an application and comparative evaluation of a HPLC and potentiometric titration methods to quantify the content of Propranolol in raw material. HPLC analysis were carried out using a C18 column and mobile phase composed of 1.6 g sodium lauryl sulfate, 0.31 g tetrabutylammonium dihydrogen phosphate, 1 ml sulfuric acid, 450 ml of water and 550 ml acetonitrile, with a flow rate of 1.8 ml/min and UV detection at 292 nm. The titration method of Propranolol was carried out using sodium hydroxide 0.1M as titrant and ethanol as solvent. The end point was potentiometrically determ

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22

Suheryanto, Zainal Fanani, and Dewi Jayanti. "Determination of copper metals in leachate using potentiometric method by concentration cells." SHS Web of Conferences 49 (2018): 02018. http://dx.doi.org/10.1051/shsconf/20184902018.

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The potentiometric method of cell type concentration is used to analyze the copper metal in leachate. This method is relatively good because it has a correlation coefficient of 0.9997 and linear region in the concentration range 1×10-5 1×10-3 mol L-1. The precision of this potentiometric method is low because the persent of RSD produced is 0.6% with an average accuracy 0f 95.35%. The detection limit (LoD) of the measurable method is 1.085×10-6 mol L-1 with LoQ 1.313×10-6 mol L-1. While the LoD instrument 1.217×10-6 mol L-1 and LoQ 1.560×10-6 mol L-1. In addition, this method is very selective

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23

Ünlüer, Özlem Biçen, Nazire Altunkök, Ebru Birlik Özkütük, and Arzu Ersöz. "Graphenoxide Cross-Linker Based Potentiometric Biosensor Design for Sarcosine Determination." Protein & Peptide Letters 28, no. 11 (2021): 1303–11. http://dx.doi.org/10.2174/0929866528666211008160111.

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Background: Sarcosine, also known as N-methyl glycine, is a natural amino acid that is an intermediate and by product in glycine synthesis and degradation. Recently found in many peptides, sarcosine has been researched as a newly accepted prostate cancer marker. The increased concentration of sarcosine in blood serum and the urine showed that malignancy of measured prostate cancer cells is active. Objective: In this article, we aimed to design a potentiometric biosensor for detection of sarcosine with a low detection limit, high selectivity, short response time, wide linear range, and satisfac

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24

Schots, J., H. De Raeve, A. Boeyckens, V. Umbrain, F. Verbeek, and F. K. Gorus. "Method-Dependent Differences in Apparent Sodium Concentrations in Plasma after Exchange Transfusions with Citrated Blood." Clinical Chemistry 38, no. 4 (1992): 558–62. http://dx.doi.org/10.1093/clinchem/38.4.558.

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Abstract Shortly after exchange transfusions (n = 7) with citrate-dextrose-phosphate (CDP)-treated blood, but not after regular transfusions (n = 9), sodium concentrations in plasma were significantly and paradoxically lower (3-10 mmol/L) by Ektachem 700 XR determination [with use of electrolyte reference fluid (ERF) generation 00] than by flame photometry. Similar between-method differences could also be generated by in vitro supplementation of plasma pools with CDP solution, with trisodium citrate, or to a lesser extent with Na2HPO4. For four potentiometric methods the analytical recovery of

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25

Li, Sheng-Kai, Jung-Chuan Chou, Tai-Ping Sun, and Shen-Kan Hsiung. "STUDY ON THE POTENTIOMETRIC GLUCOSE BIOSENSOR BASED ON THE SnO2/ITO/PET." Biomedical Engineering: Applications, Basis and Communications 21, no. 06 (2009): 411–14. http://dx.doi.org/10.4015/s1016237209001532.

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A potentiometric glucose biosensor based on a SnO2/ITO/PET substrate is presented in this study. The sensing membrane of SnO2 is coated on ITO/PET substrate by utilized radio frequency (RF)-sputtering method of semiconductor fabrication. The potentiometric glucose biosensor is established on an FET-type pH sensor. Therein, the glucose oxidase (GOD) and chitosan/multi-wall carbon nano-tubes (chitosan/MWCNTs) are immobilized by 3-glycidoxypropyl trimethoxysilane (3-GPTS). Finally, the drift characteristic and calibration curve of the potentiometric pH sensor and potentiometric glucose biosensor

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26

Ohura, Hiroki, and Toshihiko Imato. "Rapid and Automated Analytical Methods for Redox Species Based on Potentiometric Flow Injection Analysis Using Potential Buffers." Journal of Automated Methods and Management in Chemistry 2011 (2011): 1–14. http://dx.doi.org/10.1155/2011/516165.

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Two analytical methods, which prove the utility of a potentiometric flow injection technique for determining various redox species, based on the use of some redox potential buffers, are reviewed. The first is a potentiometric flow injection method in which a redox couple such as Fe(III)-Fe(II), Fe-Fe(CN), and bromide-bromine and a redox electrode or a combined platinum-bromide ion selective electrode are used. The analytical principle and advantages of the method are discussed, and several examples of its application are reported. Another example is a highly sensitive potentiometric flow injec

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27

Boeyckens, Ann, Jan Schots, Hugo Vandenplas, Freedy Senesael, Wim Goedhuys, and Frans K. Gorus. "Ektachem Slides for Direct Potentiometric Determination of Sodium in Plasma: Effect of Natremia, Blood pH, and Type of Electrolyte Reference Fluid on Concordance with Flame Photometry and Other Potentiometric Methods." Clinical Chemistry 38, no. 1 (1992): 114–18. http://dx.doi.org/10.1093/clinchem/38.1.114.

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Abstract With electrolyte reference fluid (ERF)00, results from Kodak Ektachem slides for the direct potentiometric assay of sodium in plasma were significantly correlated with results from flame photometry, but also appeared to be systematically higher, especially in hypernatremic patients. Indirect potentiometry with the Technicon RA-1000 yielded intermediate values. In 23 hypernatremic patients with greater than or equal to 6 mmol/L difference in sodium between Ektachem ERF00 and flame photometry, a clinical survey disclosed the frequent association of large between-method differences with

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28

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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29

Moustafa, Azza A., Maha A. Hegazy, Dalia Mohamed, and Omnia Ali. "Functionalized Fe3O4 Magnetic Nanoparticle Potentiometric Detection Strategy versus Classical Potentiometric Strategy for Determination of Chlorpheniramine Maleate and Pseudoephedrine HCl." Journal of Analytical Methods in Chemistry 2019 (February 25, 2019): 1–10. http://dx.doi.org/10.1155/2019/6947042.

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Nanosized adsorbents when used in potentiometric methods of analysis usually show better performance rather than the traditional potentiometric approach; this is attributed to the high specific surface area of the nanomaterial used in addition to the lack of internal diffusion resistance, thus improving their adsorption capacity. In the presented work, a rapid and sensitive potentiometric determination of chlorpheniramine maleate (CPM) and pseudoephedrine hydrochloride (PSE) in pure form, in pharmaceutical preparation, and in biological fluid was developed based on functionalized magnetic nano

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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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31

Lee, Hsiang Ching, Li Fan Zhang, Cheng Hsun Lu, Jyh Ling Lin, Yuan Lung Chin, and Tai Ping Sun. "Development of Anodic Titanium Oxide Nanotubes Applied to a pH Sensor with Amperometric and Potentioimetric Methods." Advanced Materials Research 528 (June 2012): 10–13. http://dx.doi.org/10.4028/www.scientific.net/amr.528.10.

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The purpose of this study was to develop the anodized titanium oxide nanotubes (ATONs) as a pH electrode with amperometric and potentiometric method. Titanium oxide nanotubes film was produced on pure titanium piece by titanium anodization at room temperature. The best one ATONs electrode has a linear pH response approximately 53 mV/pH with potentiometric method and 13 A/pH with amperometric method in the concentration range between pH 2 and 12.

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32

Sun, Ziqi, Yufeng Zhang, Xinyue Xu, Minglin Wang, and Lijuan Kou. "Determination of the Total Phenolic Content in Wine Samples Using Potentiometric Method Based on Permanganate Ion as an Indicator." Molecules 24, no. 18 (2019): 3279. http://dx.doi.org/10.3390/molecules24183279.

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A rapid and accurate determination method for total phenolic content is of great importance for controlling the quality of wine samples. A promising potentiometric detection approach, based on permanganate ion fluxes across ion-selective electrode membranes, is fabricated for measuring the total phenolic content of wine. The results show that the presence of phenols, such as gallic acid, leads to a potential increase for the potentiometric sensor. Additionally, the present sensor exhibits a linear potential response with the concentration range from 0.05 to 3.0 g/L with a detection limit of 6.

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33

Kamel, Ayman H., Abd El-Galil E. Amr, Nashwa H. Ashmawy, et al. "Validation of a Novel Potentiometric Method Based on a Polymeric PVC Membrane Sensor Integrated with Tailored Receptors for the Antileukemia Drug Cytarabine." Polymers 12, no. 6 (2020): 1343. http://dx.doi.org/10.3390/polym12061343.

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A simple, rapid and easy method is proposed for the detection of a cytostatic therapeutic drug, cytarabine, in real samples. The method is based on potentiometric transduction using prepared and characterized new ion-selective electrodes for cytarabine. The electrodes were integrated with novel man-tailored imprinted polymers and used as a sensory element for recognition. The electrodes revealed a remarkable potentiometric response for cytarabine over the linearity range 1.0 × 10−6–1.0 × 10−3 M at pH 2.8–4 with a detection limit of 5.5 × 10−7 M. The potentiometric response was near-Nernstian,

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34

Mironyak, Maria, Olena Volnyanska, Oksana Labyak, Vadym Kovalenko, and Valerii Kotok. "DEVELOPMENT OF A POTENTIOMETRIC SENSOR SENSITIVE TO POLYSORBATE 20." EUREKA: Physics and Engineering 4 (July 31, 2019): 3–9. http://dx.doi.org/10.21303/2461-4262.2019.00942.

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Polyoxyethylated sorbitans (polysorbates) are widely used in the chemical, pharmaceutical, and cosmetic industries, but only quantitative determination is used mainly for chromatographic methods. In this paper, the results of the development and testing of a potentiometric sensor sensitive to nonionic surfactant polyoxyethylene sorbitan monolaurate (polysorbate-20) are presented. An anion of the heterogeneous acid of the Keggin structure (12-molybdophosphate heteropolyacid) was used as a counterion to obtain the electrode-active substance for the potentiometric sensor membrane. Polysorbate-20

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35

Rianasari, Putri F., Zulfikar Zulfikar, and Siswoyo Siswoyo. "Optimasi dan Karakterisasi Kinerja Sistem Pengukuran Potensiometrik Fosfat dengan Elektroda Kobalt Secara Flow Injection Analysis." Jurnal Ilmiah Universitas Batanghari Jambi 23, no. 2 (2023): 1312. http://dx.doi.org/10.33087/jiubj.v23i2.3714.

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Phosphorus is known as an essential nutrient required by plant in large numbers and absorbed in the form of phosphate ions, either as a primary orthophosphate ion H2PO4- or secondary orthophosphate ion HPO42-. Concentration of the phosphorus in the soil is usually determined by the spectrophotometric method, while the potentiometric method has not been widely used because of the availability of the phosphate-selective electrodes are not yet available in the market. This research has been conducted in the development and assessment of performance of the potentiometric method that utilizes cobal

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BJORNSDOTTIR, KRISTIN, GREGORY E. BOLTON, PATRICIA D. McCLELLAN-GREEN, LEE-ANN JAYKUS, and DAVID P. GREEN. "Detection of Gram-Negative Histamine-Producing Bacteria in Fish: A Comparative Study." Journal of Food Protection 72, no. 9 (2009): 1987–91. http://dx.doi.org/10.4315/0362-028x-72.9.1987.

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Poisoning due to ingestion of foods with elevated levels of biogenic amines (histamine, putrescine, cadaverine, and tyramine) is well documented. Histamine fish poisoning largely is due to growth of naturally occurring bacteria associated with scombroid fish species. A rapid and reliable method is needed to screen for the presence of histamine-forming bacteria in fish. This study included a comparison of three methods for the detection of histamine-producing bacteria. A total of 152 histamine-producing and non–histamine-producing bacteria from multiple sources were screened using a modified Ni

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Doroshchuk, V., B. Oliinyk, and S. Alekseev. "Modified Gran’s Plot Method for Calibrationless Potentiometric Nitrate Determination." Methods and Objects of Chemical Analysis 17, no. 2 (2022): 70–80. http://dx.doi.org/10.17721/moca.2022.70-80.

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This article demonstrates a new approach of multiple additions direct potentiometric determination of nitrate ion in natural and potable freshwater. The main feature of this approach is no need to pre-calibrate the electrode and to use the slope in the calculations. The experimental procedure is very similar to one of classic potentiometric titration. To test and illustrate the approach, ion-selective electrodes with tridodecylmethylammonium nitrate as ion-exchanger in plasticized membrane were produced. The application of the proposed mathematical algorithm for processing of data obtained by

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Takahashi, Akio, Takayuki Natsume, Nobuyoshi Koshino, Shigenobu Funahashi, Yasuhiro Inada, and Hideo D. Takagi. "Speciation of trimethyltin(IV): hydrolysis, complexation equilibria, and structures of trimethyltin(IV) ion in aqueous solution." Canadian Journal of Chemistry 75, no. 8 (1997): 1084–92. http://dx.doi.org/10.1139/v97-128.

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The hydrolysis constants of trimethyl- and triethyltin(IV) ions and the stability constants for the complexation of trimethyltin(IV) with trimethylamine, N-substituted glycines (N,N-dimethylglycine and N,N,N-trimethylglycine), and aminopolycarboxylate ions (N-methyliminodiacetate, nitrilotriacetate, and ethylenediamine-N,N′-diacetate) were determined by the potentiometric method at 25 °C and I = 0.l mol dm−3 ((H, Na)ClO4 and (H, Na)NO3). The structural parameters of Me3Sn(OH2)2, Et3Sn(OH2)2, and Me3Sn(OH2)(OH) in solution were determined by the EXAFS method. The coordination structures of trim

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Bila, T. A., E. V. Lyashenko, and O. V. Okhrimenko. "POTENTIOMETRIC METHOD OF NATURAL ENVIRONMENTAL WATERS PH DETERMINATION." Water bioresources and aquaculture, no. 1 (2021): 228–34. http://dx.doi.org/10.32851/wba.2021.1.17.

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Fayyad, M., M. Tutunji, R. S. Ramakrishna, and Z. Taha. "Dissolved Oxygen: Method Comparison with Potentiometric Stripping Analysis." Analytical Letters 20, no. 4 (1987): 529–35. http://dx.doi.org/10.1080/00032718708067986.

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Saber, Amr L., Mohmed A. Elmosallamy, Hamada M. Killa, and Mohmed M. Ghoneim. "Selective potentiometric method for determination of flucloxacillin antibiotic." Journal of Taibah University for Science 7, no. 4 (2013): 195–201. http://dx.doi.org/10.1016/j.jtusci.2013.06.002.

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Cristiano, B. F. G., J. U. Delgado, J. W. S. da Silva, P. D. de Barros, R. M. S. de Araújo, and R. T. Lopes. "Semi-automated potentiometric titration method for uranium characterization." Applied Radiation and Isotopes 70, no. 7 (2012): 1373–75. http://dx.doi.org/10.1016/j.apradiso.2011.11.025.

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Rachidi, M., K. Digua, P. Hubert, My A. Faouzi, Y. Cherrah, and A. Bouklouze. "Analytical Validation of Potentiometric Method for Cetirizinium Ion." Analytical Letters 39, no. 8 (2006): 1699–708. http://dx.doi.org/10.1080/00032710600713925.

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Brainina, Khiena, Natalia Stozhko, Maria Bukharinova, Ekaterina Khamzina, and Marina Vidrevich. "Potentiometric method of plant microsuspensions antioxidant activity determination." Food Chemistry 278 (April 2019): 653–58. http://dx.doi.org/10.1016/j.foodchem.2018.11.098.

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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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Maria, Mironyak, Volnyanska Olena, Labyak Oksana, Kovalenko Vadym, and Kotok Valerii. "DEVELOPMENT OF A POTENTIOMETRIC SENSOR SENSITIVE TO POLYSORBATE 20." EUREKA: Physics and Engineering, no. 4 (July 31, 2019): 3–9. https://doi.org/10.21303/2461-4262.2019.00942.

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Polyoxyethylated sorbitans (polysorbates) are widely used in the chemical, pharmaceutical, and cosmetic industries, but only quantitative determination is used mainly for chromatographic methods. In this paper, the results of the development and testing of a potentiometric sensor sensitive to nonionic surfactant polyoxyethylene sorbitan monolaurate (polysorbate-20) are presented. An anion of the heterogeneous acid of the Keggin structure (12-molybdophosphate heteropolyacid) was used as a counterion to obtain the electrode-active substance for the potentiometric sensor membrane. Polysorbate-20

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Maslov, Olexander, Sergii Kolisnyk, Nikolay Komissarenko, and Tatiana Kostina. "Development and validation potentiometric method for determination of antioxidant activity of epigallocatechin-3-O-gallate." Pharmacologyonline 2 (September 1, 2021): 35–42. https://doi.org/10.5281/zenodo.7813098.

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There is high interest of scientists in the study of antioxidant activity (AOA) of different objects, which is caused by study influence of free radicals on developing pathological process in human’s body. Today, there is no main method that would be used to assess antioxidant activity. In our view, the development and modification of existing methods for determining antioxidant activity is a topical and prospective task of the pharmacy, cosmetic and food industries. The aim of study was to develop and validate potentiometric method for determination of antioxidant activity of epigalloca

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Ramamurthy, Narayanan, Narayan Baliga, Joyce A. Wahr, Ulrich Schaller, Victor C. Yang, and Mark E. Meyerhoff. "Improved protamine-sensitive membrane electrode for monitoring heparin concentrations in whole blood via protamine titration§." Clinical Chemistry 44, no. 3 (1998): 606–13. http://dx.doi.org/10.1093/clinchem/44.3.606.

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Abstract An improved protamine-sensitive electrode based on a polymeric membrane doped with the charged ion exchanger dinonylnaphthalenesulfonate (DNNS) is used for monitoring heparin concentrations in whole blood. The electrode exhibits significant nonequilibrium potentiometric response to polycationic protamine over the concentration range of 0.5–20 mg/L in undiluted whole-blood samples. The sensor can serve as a simple end point detector for the determination of heparin via potentiometric titrations with protamine. Whole-blood heparin concentrations determined by the electrode method (n ≥15

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Vaishali, R. Patil, and P. Deohate Pradip. "The determination of pharmaceutically important ibuprofen by non-aqueous potentiometric titration method." Journal of Indian Chemical Society Vol. 90, Sep 2013 (2013): 1379–82. https://doi.org/10.5281/zenodo.5789139.

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Department of Chemistry, Shri Radhakisan Laxminarayan Toshniwal College of Science, Akola-444 001,Maharashtra, India <em>E-mail </em>: pradip22209l@yahoo.co.in <em>Manuscript received online 05 December 2012, revised 26 December 2012, accepted 30 December 2012</em> The determination of pharmaceutically important ibuprofen by non-aqueous potentiometric titration method using isopropyl alcohol as the solvent and KOH in isopropyl alcohol as the titrant has been established. The study of effect of solvent and concentration on potentiometric determination of ibuprofen has been carried out followed

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Rozhnov, E., Marina Shkolnikova, and Olga Chugunova. "SOME ELECTROCHEMICAL METHODS POSSIBILITIES AND LIMITATIONS TO DETERME THE ANTIOXIDANT ACTIVITY OF HIPPOPHAE RHAMNOIDES L. FRUITS." Bulletin of KSAU, no. 5 (January 22, 2025): 210–16. https://doi.org/10.36718/1819-4036-2023-5-210-216.

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The purpose of research is a comparative study of the antioxidant activity of sea buckthorn fruits by electrochemical methods. Tasks: determination in the AOA experiment of samples of sea buckthorn fruits by amperometric and potentiometric methods; study of the quantitative composition of the components that determine the total AOA of sea buckthorn fruits; establishing the dependence of AOA on the ratio of components in fruits; substantiation of the method for determining the AOA of sea buckthorn fruits. The objects of the study were the fruits of sea buckthorn harvested in 2021. The content o

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