Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods

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