Potentiometric determination of monuron in herbicide formulations

Abstract

Monuron is extracted from a dispersion of the sample in hydrochloric acid into chloroform and the residue after evaporation of the chloroform is hydrolysed with boiling 24 N sulphuric acid. The liberated dimethylamine is distilled into 2 per cent. boric acid and titrated potentiometrically with standard hydrochloric acid. The method has been applied to technical monuron and aqueous suspension formulations with an error of 0·9 per cent.