Titrations of Weak Acids and Bases Related to Nitroguanidine

Potentiometric Electrode Systems In Nonaqueous Titrimetry

“…The potentiometric titration of substituted fatty acids in benzene-methanol solution has been performed wfith the antimony electrode (162). The strongly basic solvent ethylenediamine has proved most valuable for the titration of phenols and other wreak acids (44,112,130,137,193). Using a stripchart recorder with a pH meter serving as an amplifier, Katz and Glenn (112) were able to obtain directly either the differential or the direct titration curves in the determination of phenols in the products of coal hydrogenation.…”

“…The determination of isonicotinic hydrazide by acid-group titration in diethylamine as solvent has been reported (4). Nitroguanidine and related compounds (44) and phenolic groups in lignin preparations (23) have been titrated in dimethylformamide solution.…”

“…This electrode has been used for the titration of very weak acids in ethylenediamine, pyridine, and certain other solvents (74). Nitroguanidine and thiourea, which are not titratable in acetic acid, gave good results in trifluoroacetic acid when a platinum electrode was used (44). Neutralization studies in selenium oxychloride (150) and in anhydrous sulfuric acid have been reported (213).…”

Other Carboxylic Acids

“…164 indicate that it may be a better medium than acetic acid for the titration of very weak bases. Yet preliminary studies by DeVries et ö/.…”

The Trifluoroacetic Acid Solvent System. Part II. Acids

“…Some studies have already been carried out using perchloric acid as a titrant (3,4). However, very few studies of acids in this solvent have been reported.…”