Études des transformations des formes du carbone, azote, phosphore, soufre et des principaux éléments minéraux au cours de la mesure de la demande totale en oxygene—II. Transformation des formes de l'azote

The experiments realized with the laboratory T.O.D. meter Ionics 225 the DOW Chemical have allowed to distinguish, the stable forms of organic and inorganic nitrogen, after high temperature catalytic action. Organic and ammoniacal nitrogen are partially oxidized during the T.O.D. measurements whereas in the classic C.O.D. and B.O.D.₅ tests these forms are oxidized incompletely. Nitrous and nitric nitrogen induce negative interferences, which can be evaluated and corrected by graphical corrections.