An Interpretation of the End Point Error in the Potentiometric Titration of Bromide and Chloride Mixtures with Silver Nitrate

1961 ◽  
Vol 33 (2) ◽  
pp. 190-194 ◽  
Author(s):  
R. C. Bowers ◽  
Laura. Hsu ◽  
J. A. Goldman
Keyword(s):  
Silver Nitrate ◽  
Potentiometric Titration ◽  
End Point

scholarly journals ELECTROMETRIC TITRATION OF CHLORIDE IN SMALL VOLUMES

1955 ◽  
Vol 32 (4) ◽  
pp. 822-829 ◽  
Author(s):  
J. A. RAMSAY ◽  
R. H. J. BROWN ◽  
P. C. CROGHAN
Keyword(s):  
Standard Deviation ◽  
Silver Nitrate ◽  
Biological Fluids ◽  
Silver Electrode ◽  
End Point ◽  
Other Substances ◽  
Electrometric Titration ◽  
In Series ◽  
A Current

1. Two methods of titrating chloride with Ag+ ion using the potentiometric end-point are described. 2. The first method is conventional in that silver nitrate is added from a burette. It deals with volumes down to 0.2µl. and can measure 1µg. of chloride with an error of < ± 1% (standard deviation). 3. According to the second method Ag+ ion is added by passing a current through a silver electrode in series with a condenser. The charge developed on the condenser is a measure of the amount of chloride titrated. This method deals with volumes down to 0.5 x 10-3µl. and can measure 10-4µg. of chloride with an error of < ± 1% (standard deviation). 4. As far as is known these methods are not susceptible to interference from other substances likely to be present in biological fluids.

Potentiometric Determination of Chlorides in Wine, Distilled Spirits, and Wine Vinegar

1966 ◽  
Vol 49 (3) ◽  
pp. 498-501
Author(s):  
Clifford E Hubach
Keyword(s):  
Silver Nitrate ◽  
Collaborative Study ◽  
Potentiometric Determination ◽  
End Point ◽  
Direct Titration ◽  
Distilled Spirits ◽  
Wine Vinegar ◽  
High Degree

Abstract Collaborative study of the Pro method for determining chlorides in wines and distilled spirits by direct titration with silver nitrate followed by potentiometric reading of the end point gave accurate and reproducible results. The procedure is suitable for repetitious analyses in control laboratories, and it is also adaptable to determinations requiring a high degree of precision. Recoveries of chloride added to samples averaged 99.7%. The method is recommended for adoption as official, first action.

A graphical method for locating the end point in potentiometric titration curves

1974 ◽  
Vol 271 (5) ◽  
pp. 344-345 ◽  
Author(s):  
A. M. Wahbi ◽  
S. Ebel ◽  
C. P. Christiansen
Keyword(s):  
Potentiometric Titration ◽  
Graphical Method ◽  
End Point ◽  
Titration Curves

Conductimetric and potentiometric investigation of effect of acidity on formation of homoconjugates in acetonitrile solvent

1990 ◽  
Vol 68 (5) ◽  
pp. 674-678 ◽  
Author(s):  
Turgut Gündüz ◽  
Esma Kiliç ◽  
Güleren Özkan ◽  
Muhammed F. Awaad ◽  
Mustafa Tastekin
Keyword(s):  
Carboxylic Acids ◽  
Potentiometric Titration ◽  
Major Part ◽  
Nitrogen Atmosphere ◽  
Nonaqueous Media ◽  
Potentiometric Titrations ◽  
End Point ◽  
Titration Curves ◽  
Aliphatic Carboxylic Acids ◽  
Conjugate Base

In the present work, 11 aromatic and nine aliphatic carboxylic acids, namely benzoic, 2-nitrobenzoic, 3-nitrobenzoic, 4-nitrobenzoic, 2,4-dinitrobenzoic, 3,5-dinitrobenzoic, 2-aminobenzoic, 3-aminobenzoic, 4-aminobenzoic, o-phthalic, salicylic, formic, acetic, monochloroacetic, dichloroacetic, trichloroacetic, propionic, n-butyric, caprylic, and myristic acids, were titrated conductimetrically and potentiometrically with triethylamine in acetonitrile solvent, under a nitrogen atmosphere, at 25 °C. Closer investigation of the conductimetric titration curves of these acids showed that the acidity of an acid, rather than the basicity of its conjugate base, plays a major part in the formation of homoconjugate ions, at least in acetonitrile solvent. If the acid is strong enough, there is a maximum before the experimental end point at about the half-neutralization point. To determine the minimum strength for an acid to show this maximum before the end point, all acids were also titrated potentiometrically. It was found that those acids which have half-neutralization potentials over −85 mV give a strong homoconjugation reaction and show a maximum before the experimental end point. Moreover, the acids that show maxima before the experimental end point in the conductimetric titration also show rather well-shaped potentiometric titration curves. Keywords: nonaqueous media, conductimetric titrations, potentiometric titrations, titration in acetonitrile, acidity and homoconjugation.

129. The Chlorine Content of Milk as an Indication of Mastitis

1936 ◽  
Vol 7 (1) ◽  
pp. 47-54 ◽  
Author(s):  
J. W. Blood ◽  
A. Rowlands
Keyword(s):  
Silver Nitrate ◽  
Rapid Method ◽  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
Chlorine Content ◽  
Careful Examination ◽  
Simple Test ◽  
End Point ◽  
Direct Titration

1. The importance of a rapid and simple test for the diagnosis of mastitis in cows is a question which has attracted considerable attention on the part of many workers. One such test based on the determination of chlorine in milk by a rapid method has been advocated recently by Rosell.2. The authors of this paper have made a careful examination of this method and compared the results obtained on samples of milk with those given by other methods known to yield reliable and reasonably accurate results.3. The direct titration of chlorine in milk with silver nitrate solution, without the removal of proteins, invariably gives high results, and, moreover, a satisfactory end-point is difficult to obtain.

scholarly journals Application of Home Made Ag2S Electrode in Alkaline Media

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

Direct Potentiometric Titration of Urea with Urease

1976 ◽  
Vol 59 (5) ◽  
pp. 1045-1047
Author(s):  
J Harold Falls ◽  
William R Barnacascel ◽  
Perry W Britt
Keyword(s):  
Carbon Dioxide ◽  
Potentiometric Titration ◽  
Ammonium Carbonate ◽  
Break Point ◽  
End Point ◽  
Modified Method ◽  
Back Titration ◽  
Aoac Method ◽  
Titration Step

Abstract AOAC method 2.070–2.071 for determining urea with urease was shown to yield varying results according to the analyst’s interpretation of titrating to a neutral end point. The method was modified to allow the end point of the titration to correspond to the break point of ammonium carbonate (pH 4.2), which is the compound being titrated in the urea analysis. This modified method proved to be a more accurate means of urea analysis. The AOAC method was further modified and simplified by eliminating the back-titration step. Ammonium carbonate may be titrated directly to pH 4.2 without over-acidifying to eliminate carbon dioxide.

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