This European Standard specifies a method for the determination of nitrate and ammoniacal nitrogen with reduction using Devarda alloy (modified for each of the variants a; b and c). The method is applicable to all nitrogenous fertilizers; including compound fertilizers; in which nitrogen is found exclusively in nitrate form or in ammoniacal and nitrate form.
EN 15476:2009 history
2009EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda