Potentiometric Titration of Sulfate in Water and Soil Extracts Using a Lead-Mercury Amalgam Indicator Electrode

The modern thermal power plants equipment requires strict deposits control on the surfaces. Such deposits are formed from impurities entering the cycle with water, the amount of which has significantly increased at modern powerful thermal power plants. At the modern level of the coolant water treatment, it is possible to exclude most of the impurities responsible for salt deposition. Analysis of various types of the sediments has shown that carbonate deposits are an integral part of them. Modern research methods (potentiometric titration in combination with methods of mathematical modelling) for carbonate, silicate, phosphate water systems have shown the existence of phase-unstable states leading to salt deposition during the coolant circulation. In this article, the carbonate system CaCl2-Na2CO3-NaOH-H2O was studied by potentiometric titration with a glass indicator electrode. The influence of the components nature (Li2CO3, Na2CO3, Ca2CO3, LiOH, NaOH, KOH, CaCl2, MgCl2) and the conditions for the existence of phase-unstable systems with varying concentrations of these components were studied. It is known that organic phosphonates are effective inhibitors of deposits in the carbonate system. In this paper, the action of two compounds of the specified class is considered. The concentration limits of their inhibitory action have been determined.

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Potentiometric Titration of Vanadium (V) with Iron (II) in the Presence of NTA and DTPA Using Dry-Cell Graphite Electrode

Revista de Chimie ◽

10.37358/rc.21.3.8445 ◽

2021 ◽

Vol 72 (3) ◽

pp. 144-158

Author(s):

Kavitha Kamalasekaran

Keyword(s):

Acetic Acid ◽

Potentiometric Titration ◽

Graphite Electrode ◽

Correlation Coefficients ◽

Nitrilotriacetic Acid ◽

Indicator Electrode ◽

Ligand Complex ◽

Potential Jump ◽

Potentiometric Titrations ◽

Dry Cell

A sensitive potentiometric titration for vanadium (V) based effect of ligands such as nitrilotriacetic acid (NTA) and diethylenetriaminepenta-acetic acid (DTPA) are reviewed. The potential iron system decreased the presence of NTA and DTPA. In this case, iron (III) increased with respect to the vanadium (IV) volume. The production of iron (III)-ligand complex has increased. This result suggested that the formation of V(V)-NTA and V(V)-DTPA complexes were less favoured than that of V(IV)-NTA and V(IV)-DTPA complexes. The calculated correlation coefficients (r) conveyed the effectiveness of the graphite electrode as the indicator electrode for the potentiometric titrations. On comparing the potential jump values, the extent of potential caused by DTPA was found to be more than that of NTA. The utilization of graphite electrode has facilitated the potentiometric titration by significantly causing larger potential jump. This method was precise and accurate as no interference of foreign ions was observed. Hence, the approach could be applied to the vanadium (V) of any samples.

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Cobalt(II) ion-selective electrode with solid contact

Open Chemistry ◽

10.2478/s11532-008-0060-1 ◽

2008 ◽

Vol 6 (4) ◽

pp. 607-612 ◽

Cited By ~ 3

Author(s):

Cecylia Wardak

Keyword(s):

Detection Limit ◽

Response Time ◽

Potentiometric Titration ◽

Indicator Electrode ◽

Solid Contact ◽

Selective Electrode ◽

Cobalt Ions ◽

Real Samples ◽

Nernstian Slope

AbstractA new all plastic sensor for Co2+ ions based on 2-amino-5 (hydroxynaphtyloazo-1′)-1,3,4 thiadiazole (ATIDAN) as ionophore was prepared. The electrode exhibits a low detection limit of 1.5 × 10−6 mol L−1 and almost theoretical Nernstian slope in the activity range 4.0 × 10−6–1 × 10−1 mol L−1 of cobalt ions. The response time of the sensor is less than 10 s and it can be used over a period of 6 months without any measurable divergence in potential. The proposed sensor shows a fairly good selectivity for Co(II) over other metal ions. The electrode was successfully applied for determination of Co2+ in real samples and as an indicator electrode in potentiometric titration of Co2+ ions with EDTA.

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Application of Home Made Ag2S Electrode in Alkaline Media

Scientific World ◽

10.3126/sw.v8i8.3853 ◽

1970 ◽

Vol 8 (8) ◽

pp. 69-72

Author(s):

A Rajbhandari ◽

AP Yadav ◽

RR Pradhananga ◽

K Manandhar ◽

C Durante ◽

...

Keyword(s):

Silver Nitrate ◽

Potentiometric Titration ◽

Pharmaceutical Preparation ◽

Vitamin B1 ◽

Alkaline Media ◽

Indicator Electrode ◽

Membrane Electrode ◽

Thiamine Hydrochloride ◽

Silver Sulphide

Home made silver sulphide ion selective electrode was prepared and applied for argentometric titration in alkaline media for the determination of thiamine hydrochloride.The amount of thiamine hydrochloride estimated from titration of ionisable chloride with silver nitrate was found to be 637 mg/g of the vitamin B1 tablet. This result is in agreement with the value obtained from ion chromatographic (IC) and cyclic voltammetric (CV) techniques. In presence of chloride from other sources, these techniques fail, but thiamine in pharmaceutical preparation, however, can be determined by potentiometric titration in highly alkaline medium using silver- sulphide membrane electrode with silver nitrate solution at which there is no interference due to the presence of chloride from other sources. The results showed that home made silver- sulphide electrode can be used as an indicator electrode for the potentiometric determination of thiamine in pharmaceutical preparation. Keywords: Silver sulphide electrode; Potentiometric titration; Thiamine; Vitamin B1. DOI: 10.3126/sw.v8i8.3853 Scientific World Vol.8(8) 2010 pp.69-72

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Potentiometric titration with chelating agents using copper electrode as an indicator electrode

BUNSEKI KAGAKU ◽

10.2116/bunsekikagaku.16.216 ◽

1967 ◽

Vol 16 (3) ◽

pp. 216-222 ◽

Cited By ~ 6

Author(s):

Tsuyoshi NOMURA ◽

Genkichi NAKAGAWA ◽

Tsurumatsu DONO

Keyword(s):

Potentiometric Titration ◽

Chelating Agents ◽

Copper Electrode ◽

Indicator Electrode

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Potentiometric Titration of Na2HAsO4, NaPO3, Na4P2O7, and their Binary Mixtures in NaNO3Melt at 350°C Using a Novel Solid State Glass/TiO2as pH Indicator Electrode

Journal of Dispersion Science and Technology ◽

10.1080/01932690701459504 ◽

2007 ◽

Vol 28 (6) ◽

pp. 876-882 ◽

Cited By ~ 1

Author(s):

Issa M. El Nahhal ◽

Nasser Abu Ghalwa

Keyword(s):

Solid State ◽

Potentiometric Titration ◽

Binary Mixtures ◽

Indicator Electrode ◽

Ph Indicator

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Synthesis of a New Calix[4]Arene and Its Application in Construction of a Highly Selective Silver Ion-Selective Membrane Electrode

Research Letters in Organic Chemistry ◽

10.1155/2009/601089 ◽

2009 ◽

Vol 2009 ◽

pp. 1-5 ◽

Cited By ~ 3

Author(s):

Saeed Taghvaei-Ganjali ◽

Reza Zadmard ◽

Masoumeh Zeyaei ◽

Kabeh Rahnama ◽

Farnoush Faridbod ◽

...

Keyword(s):

Response Time ◽

Potentiometric Titration ◽

Fast Response ◽

Pvc Membrane ◽

Indicator Electrode ◽

Membrane Electrode ◽

Membrane Sensor ◽

Selective Membrane ◽

Ph Range ◽

Pvc Membrane Sensor

A PVC membrane sensor for Ag (I) ions has been prepared. The membrane has 5, 11, 17, 23-tetra-tert-butyl-25-(3-N, N-diethyldithio carbamoylpropoxy)-26,27,28-tris-propoxy calix[4]arene (CAD) as a carrier. It was found that the sensor exhibits a Nernstian response for Ag+ ions over a wide concentration range (10−2–10−6 M). Additionally, it illustrates a fast response time (about 5 seconds), and it can be used for at least 2 months without any considerable divergence in potentials. The nature of the plasticizer, the additive, the concentration of internal solutions in the electrodes, and the composition of the membrane were investigated. Furthermore, the suggested membrane electrode revealed good selectivities for Ag+ over a variety of other metal cations, and it could be used in the pH range of 3.0–7.0. Eventually, it was successfully applied as an indicator electrode for the potentiometric titration of Ag+ ion with NaCl.

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