MT 141 - Determination of free amines in urea herbicidess

 

Content Handbook F

 

Outline of method

The herbicide is dispersed in hydrochloric acid and extracted with chloroform, the free amines being retained in the acid layer. The free aromatic amines are determined by bromination and the free aliphatic by distillation into hydrochloric acid, which is back titrated with standard sodium hydroxide.