Microtitration of weak organic acids in nonaqueous solvents

Determination of Imides, Aromatic, Polyimides, Polyamides, and Poly (Amide-Imides) by Alkali Fusion Reaction Gas Chromatography

“…Conductometric titrations have been performed in water (1) and aqueous ammonia solutions (2) using lithium hydroxide as the titrant. Nonaqueous titrations, using sodium or potassium methoxide, have been performed in benzene-methanol (3), n-butylamine (3), ethylenediamine (4,5), and dimethylformamide (6,7); end points were detected visually or potentiometrically. The more weakly acidic imides have also been successfully determined by potentiometric (8)(9)(10)(11), derivative potentiometric (12), derivative spectrophotometric (12), and coulometric (13) titrations using quaternary ammonium hydroxides as titrants.…”

“…The best straight line calibration curves were determined by a least-squares re- N-Benzylsuccinimide Benzyl-100.9 1.0 amine °Except as noted, samples were reacted isothermally at 250 °C for 30 min. 6 Based on five or more determinations. c Sample was heated from 38 to 220 0 C over a period of 20 min.…”