DS DS/EN 15750
DS DSEN 15750 2009-NOV-19 Fertlzers - Determnaton of total ntrogen n fertlzers contanng ntrogen only as ntrc ammonacal and urea ntrogen by two dfferent methods
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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 [2]. Method B specifies a method by reduction of nitrate with iron and tin(II)-chloride.