Potentiometric Titration of Salts of Organic Bases in Acetic Acid

1952 ◽  
Vol 24 (2) ◽  
pp. 300-306 ◽  
Author(s):  
C. W. Pifer ◽  
E. G. Wollish
Keyword(s):  
Acetic Acid ◽  
Potentiometric Titration ◽  
Organic Bases

HYDROLYSIS OF CELLULOSE ACETATE SULPHATE IN ACETONE

1954 ◽  
Vol 32 (9) ◽  
pp. 815-822 ◽  
Author(s):  
Karl Keirstead ◽  
John Myers
Keyword(s):  
Acetic Acid ◽  
Cellulose Acetate ◽  
Sulphuric Acid ◽  
Potentiometric Titration ◽  
Titration Method ◽  
Acetate Ester ◽  
Hydrolysis Of Cellulose ◽  
Potentiometric Titration Method ◽  
Hydrolysis Of

When cellulose acetate sulphate is dissolved in acetone the hydrolysis of the sulphate ester is rapid compared with that of the acetate ester. In 70% acetone the relative rates are reversed. Hydrolysis of the sulphate ester in acetone is greatly affected by the temperature. At 25 °C. or greater the hydrolysis is complete after 24 hr. A potentiometric titration method has been developed for the estimation of sulphuric acid in the presence of smaller amounts of acetic acid.

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

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.

Determination of Acridine by Potentiometric Titration in Acetic Acid

1961 ◽  
Vol 33 (4) ◽  
pp. 497-498 ◽  
Author(s):  
P. R. Naidu ◽  
V. R. Krishnan
Keyword(s):  
Acetic Acid ◽  
Potentiometric Titration

Potentiometric Determination of Vitamin C in Highly Colored Products

1964 ◽  
Vol 47 (4) ◽  
pp. 754-755
Author(s):  
William S Hardesty
Keyword(s):  
Ascorbic Acid ◽  
Acetic Acid ◽  
Vitamin C ◽  
Acid Medium ◽  
Potentiometric Titration ◽  
Potentiometric Determination ◽  
Acetic Acid Medium ◽  
Commercial Products ◽  
Pt Electrodes

Abstract The method of Barakat and co-workers for determination of vitamin C in colored products has been modified for potentiometric use. The procedure is simple and rapid: An aliquot of sample containing 1—3 nig of ascorbic acid is titrated in a 3% acetic acid medium in the presence of KI with previously standardized 0.01% N-bromosuccinimide. The potentiometric titration uses two Pt electrodes with a polarizing current. Results were compared with the USP XVI method and the AOAC 2,6-dichlorophenol indophenol method. Recoveries, obtained from seven commercial products, four of which were vitamin C-enriched, ranged from 96 to 101%. The method also works well on drug mixtures containing ascorbic acid. It is recommended that the method be studied collaboratively.

scholarly journals Theoretical and Practical Considerations of the Newer Methods of the European Pharmacopeia for the Assay of Halide Salts of Organic Bases

2002 ◽  
Vol 70 (2) ◽  
pp. 129-133 ◽  
Author(s):  
Keyword(s):  
Hydrochloric Acid ◽  
Sodium Hydroxide ◽  
Potentiometric Titration ◽  
Halide Salt ◽  
Organic Bases ◽  
Halide Salts

A certain type of titration methods have appeared with an increasing frequency during the last years, this being evident surveying the latest editions of the European Pharmacopeia (1997-2001) [1-3], where there are now more than fifty monographs on the assay of halide salt of organic bases by potentiometric titration of the sample dissolved in ethanol or in an ethanolwater mixture with sodium hydroxide after addition of a defined volume of diluted hydrochloric acid [...]

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