title: Colorimetric determination of some sulphonamides with phenothiazine.
abstract: Two simple and sensitive calorimetric procedures for determination of some sulphonamides with phenothiazine (thiodiphenylamine) are presented. One is based on reaction in aqueous alcohol solution in presence of hypochlorite, with direct measurement at 515 nm. The other is based on reaction in presence of copper(II) acetate at 70 degrees , extraction with chloroform and measurement at 515 nm. The method is applied to the determination of sulphonamides in pure and tablet form, with a coefficient of variation less than 2%.
authors.affiliation: Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, University of Alexandria, Egypt.
authors.forename: H
authors.initials: H
authors.lastname: Abdine
authors.forename: M A
authors.initials: MA
authors.lastname: Korany
authors.forename: A M
authors.initials: AM
authors.lastname: Wahbi
authors.forename: F
authors.initials: F
authors.lastname: El-Yazbi