DIN EN 15750-2010 肥料.用两种不同的方法对含氮磷钾的肥料,如氮,氨和尿素氨,总氮含量的测定.德文版本EN 15750-2009
Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version EN 15750:2009
This document specifies two different methods (Methods A and B) for the determination of the total nitrogen content in fertilizers. Method A specifies the titrimetric method after distillation according to ISO 5315:1984. Method B specifies a method by reduction of nitrate with iron and tin(II)-chloride. The methods have been validated in the frame of european inter-laboratory tests.