BS EN 15750:2009 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
BS EN 15750 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 BS ISO 5315:1984. Method B specifies a method by reduction of nitrate with iron and tin(II)-chloride.
Contents of BS EN 15750:
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Sampling and sample preparation
6 Method A
7 Method B
8 Precision of methods A and B
9 Test report
Annex A (informative) Statistical results of the inter-laboratory tests
Bibliography