Use of Differential Reaction Rates to Analyze Mixtures of Organic Materials Containing the Same Functional Group. Application to Mixtures of Amines.

Synergistic Effects in Analyses Based on Differential Reaction Rates.

“…For the analysis of mixtures, the wide applicability of the graphical method based on rates of reaction has been demonstrated (1)(2)(3)(4)(5)(6)(7)(8)(8)(9)(10)(11). When using this method for binary mixtures, it was noted that in some cases the slope of the second portion of the rate plots, the linear portion which represents the rate of reaction of the slower component after essentially all the faster component has reacted, deviated significantly from the slope of the rate plot when the same material reacted alone, using the same initial concentra-tion of reactants, a and 6 (8).…”

“…The oximation procedure (S) was used for the ketones, the acetylation procedure (8) for the alcohols, the reaction with phenyl isothiocyanate (2) for the amines, and the hydrogenation and bromination procedures (9) for the oleates. The methods were used as described, except that the temperatures were maintained constant by the use of water baths, 22°C.…”

Titrations in Nonaqueous Solvents

“…Hanna and Siggia (54) have applied their method of differential reaction rate analysis technique to the determination of primary, secondary, and tertiary amines and mixtures of aliphatic and aromatic amines. The method involves the reaction between amines and isothiocyanate to form thiourea.…”

Analysis of multicomponent ester mixtures by dual temperature differential kinetics

“…The present study, which involves the secondorder extrapolation approach, was initiated in an attempt to expand the limits of differential kinetic analysis by using temperature variation reactions.Kinetic methods for analysis of binary mixtures have been devised to treat a great number of systems. These have included such procedures as the single point method (/), originally applied to ester mixtures; first-order reaction method of proportional equations (2); and various functional group analyses by graphical logarithmic extrapolation (3,4). Individual criteria dictate the advantages to be gained by selection of one technique over the others.…”