Nonaqueous Titration of High Molecular Weight Nitrogen Compounds.

Puthoff, M. E.; Benedict, J. H.

doi:10.1021/ac60217a060

Cited by 10 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It will be noted that the mean experimental slope is essentially twice the theoretical value of 59 mV; and it follows that (Eb)s -RTjF In This result is compatible with the monomer-dimer equilibrium for acetic acid in acetic anhydride (20), as given in Equation 11, 2 HOAc ^(HOAc)2; KD = -= 103 (11) Xm 3 in which M and D refer to the monomer and dimer, respectively. In effect the solvent parameter for acetic acid in this system must be calculated as the dimer because of the size of KD.…”

Section: F Rt Rt Ysupporting

confidence: 66%

See 1 more Smart Citation

Potentiometric study of base strengths in the binary solvent, acetic anhydride-acetic acid

Kolling¹,

Cooper²

1970

Anal. Chem.

View full text Add to dashboard Cite

Section: F Rt Rt Ysupporting

confidence: 66%

“…Comparison of EB and EHN for a base as a function of mole fraction (X) of acetic anhydride in the binary solventBase concentration is 0.0034M. Curve (1) Ehn for LiOAc; (2) Eb for LiOAc;(3) Ehn for tri-«-butylamine; and (4) Eb for tri-nbutylamine…”

mentioning

confidence: 99%

Potentiometric study of base strengths in the binary solvent, acetic anhydride-acetic acid

Kolling¹,

Cooper²

1970

Anal. Chem.

View full text Add to dashboard Cite

“…Quats with a halide or weakly acidic anion can be titrated with perchloric acid after being dissolved in glacial acetic acid containing mercuric acetate (29). A similar procedure uses acetic anhydride solvent and does not require the mercuric acetate (30). These methods are rapid and precise but cannot be used with sulfate quats.…”

Section: Wet Analytical Methods For Quatsmentioning

confidence: 99%

The analysis of cationic surfactants

Metcalfe¹

1984

J Americ Oil Chem Soc

View full text Add to dashboard Cite

Long-chain cationic surfactants have become a very important class of industrial chemicals. These useful oleochemicals are usually based on vegetable oils and animal fats. They have many applications which include fabric softeners, antistatic agents, organo clays, emulsifiers, germicides, flotation chemicals, corrosion inhibitors and foam depressents. The fatty quaternary ammonium compounds (quats) are by far the most important of this group of the commercial compounds. However, the fatty amine salts and amine oxides must also be classified as cationic surfactants. Although not as widely used as quats, they have special properties and uses which are often unique and useful. The various analytical methods used for these chemicals serves several objectives, including routine quality control, identification and characterization, determination in mixtures and formulations, determination at use level, and determination in the environment. In general, the objective of the analysis will determine what method will be used. Routine quality control procedures will most often use wet methods or some simple instrumental techniques. Identification and characterization of unknown cationic samples often require the most sophisticated of instrumental and chromatographic methods. Use level and environmental samples usually must be analyzed using the most sensitive methods. Often, colorimetric analysis is adequate. These samples often must undergo rigorous separation and clean-up techniques before the method of choice can be used. The methodology for the analysis of fatty amines, amine oxides and quaternary ammonium compounds is reviewed with the various analytical objectives in mind. However, the main emphasis is placed on the quats.

show abstract

“…phine oxides were reported by Parker and Banks(141)• Puthoff and Benedict(151) titrated high moleculer weight quaternary ammonium halides and acetates, and the salts of fatty tertiary amines. As part of a study on the polarographic oxidation of the droppingmercury electrode in acetic acid media containing increasing amounts of acetic anhydride, Durand and Tremillon(48) carried out the amperometric and potentiometric titration at constant current of acetate in 95% acetic anhydride.…”

mentioning

confidence: 86%

Titrations in Nonaqueous Solvents

Harlow¹,

Morman²

1966

Anal. Chem.

View full text Add to dashboard Cite

A lthoughthere have been no dra-_£\_ matic "breakthroughs" during the last two years there has been notable advance in several areas. Particularly gratifying is the number of outstanding papers devoted to the fundamentals of nonaqueous equilibria. Not only are some of the more commonly used solvents such as acetonitrile receiving continued attention, but theoretical studies are being extended to solvents of very low7 dielectric constant. There appears to be a trend toward utilizing the newer types of measurements such as nuclear magnetic resonance and toward using several different types of measurements in the same investigation. In some of the recent work, for example, one finds spectrophotometric, conductometric, potentiometric, and solubility measurements combined to achieve an understanding not possible with a single technique. In the area of study concerned with the effect of solvent and acid structure on acidity, new and imaginative ideas have been introduced.

show abstract

Nonaqueous Titration of High Molecular Weight Nitrogen Compounds.

Cited by 10 publications

References 8 publications

Potentiometric study of base strengths in the binary solvent, acetic anhydride-acetic acid

Potentiometric study of base strengths in the binary solvent, acetic anhydride-acetic acid

The analysis of cationic surfactants

Titrations in Nonaqueous Solvents

Contact Info

Product

Resources

About