Determination of methylbenzimidazolone isomers in tolylene diisocyanate

Abstract

Despite the rapid advances which have occurred in ionselective electrode technology in recent years (1), few attempts have been made to measure electrode response times or to use membrane electrodes to follow fast reactions in solution.

Ultraviolet spectrometry

“…Some of these are as follows: The total phenolic composition of urine was determined by measurement of the absorption at 280 nm (293). 2,4-and 2,6-Dihydroxybenzoic acid and resorcinol were determined in the presence of each other (301), as were three isomers of cresol (155) and several isomers of methylbenzimidazolone in toluene diisocyanate (156). Xanthate and total sulfur in viscose were determined at 303 nm for the former and at 363 nm for the sulfur as sodium trithiocarbonate (288).…”