Spectrophotometric determination of phenyltrimethylammonium benzenesulphonate and its ethoxide by ion-pair extraction
Abstract
A simple spectrophotometric method is described for the determination of microgram amounts of phenyltrimethylammonium benzenesulphonate and its corresponding ethoxide by ion-pair extraction with methyl orange. The molar absorptivities and standard error of the mean for the sulphonate and ethoxide at 420 nm are 58.90 l mol–1 cm–1 and 0.04–0.289% and 178.6 l mol–1 cm–1 and 0.033–0.289%, respectively.