QUANTITATIVE ESTIMATION AS ACETIC ACID OF ACETYL, ETHYLIDENE, ETHOXY, AND α-HYDROXYETHYL GROUPS

Abstract

Kuhn and L'Orsa's method for estimating terminal methyl and similar groups was based on the recovery of the acetic acid formed when such units were oxidized with hot concentrated chromic acid solution. The method has now been reduced to the semimicro scale and refined to the point where good analyses for acetyl, ethylidene, ethoxy, and α-hydroxyethyl groups in a variety of substances are obtained. Acetylated triphenylmethyl cellulose ethers, which do not seem amenable to customary acetyl analyses, give good results by the present procedure.