Abstract
A convenient and accurate quantitative analytical method for the commercial dye products G acid, and Gama acid, has been established by ion-pair reversed-phase high-performance liquid chromatography. Good resolution among G acid, Schaeffer acid, R acid, Gama acid and amino-G acid was achieved. Appropriate selection of UV detection wavelength, 230 nm, has resulted in linear absorption responses over a wide concentration range, 0–8 μg. The application of the method to a study of the rate of ammonolysis of G acid to amino-G acid is described.
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