Rapid Determinaton of Binary Mixtures by Pseudo-First-Order Differential Reaction Rates. Conductometric Determination of Carbonyl Compounds.

Rapid Determination of Primary Hydroxyl Content of Poly(Oxyalkylene) Glycols and Poly(Oxyalkylene) Sorbitols by Pseudo First-Order Differential Reaction Kinetics.

“…Principle. Reilley, et al (6) presented a generally applicable method for simultaneous reactions of two components A and B with a common reagent R, where the concentration of R with time was followed and where R may be detected with high sensitivity. If the concentration of A and B are each much greater than that of R, the rate expression for an irreversible second-order reaction becomes that of a pseudo first-order reaction.…”

“…Equation 3 stipulates that a plot of 1 /[M]0t vs. [A]e/[M\0, the mole fraction of A, at a given fraction of reagent reacted, [R]t/{R]0, yields a straight line which can serve as a calibration curve for the determination of binary mixtures. Reilley (6) pointed out that the most reliable measurements are made when the fraction [R]t/[R\0 is chosen to be 1/e. Thus, in Figure 1, Bo/(Ao + Bo 5 In a case where both of the components are available in pure form, the calibration curve can simply be determined by application of the abovementioned operations for single compound A to yield the value l/(íe [A ]") and for B to yield \/{te[B]"), and by connecting these two data points by means of a straight line.…”

Determination of carbonyl mixtures by a differential reaction rate method: A kinetic experiment for the analytical course

“…Changing t or [R]0 only leads to two redundant equations (8). 3 As the reaction of carbonyl compound with hydroxylamine hydrochloride results in a net increase in conductance which is proportional to the rate of reaction (9), this experimental method of following the course of the reaction was chosen because of the simplicity of the instrumentation. The (usually after 2-3 min), a sample of pure 3-pentanone is injected into the cell using a one-millilit,er hydrodermic syringe.…”

Rapid Analysis of Binary Amine Mixtures by Differential Reaction Rates. Detailed Study of Synergistic Effects and Other Sources of Error.

“…The analysis is accomplished by measuring K*, [as described by Papa, et al (12)], by measuring kA and kB, which are obtained by reacting pure amines with methyl iodide, and by determining the total initial concentration of amines, [M]0, by an independent method, which gives:…”

“…Apparatus. The rate of the reaction is automatically followed by a direct recording conductance apparatus in the same manner as described previously (4,12,18).…”