FprEN 18317

Organo-mineral fertilizers - Determination of the N-(n-butyl)thiophosphoric triamide (NBPT) urease inhibitor content

Publication date:   Feb 19, 2026

General information

45.99   Dispatch of FV draft to CCMC   Jul 29, 2026

CEN

CEN/TC 260 Fertilizers and liming materials

European Norm

65.080   Fertilizers

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Scope

This document specifies a method for the determination of the urease inhibitor
N-(n-butyl)thiophosphoric triamide (NBPT) and its oxidate form N-(n-butyl)phosphoric triamide (NBPTO) in urea based organo-mineral fertilizers, using the liquid chromatography coupled with triple quadrupole mass spectrometry (LC-MSQQQ).
This document is applicable to organo-mineral fertilizers.
NOTE It is possible to apply this method to inorganic fertilizers; in this case a validation is carried out by the laboratory for the procedure and data generated.

Related legislation

Legislation related to this standard

2019/1009

Regulation (EU) 2019/1009 of the European Parliament and of the Council of 5 June 2019 laying down rules on the making available on the market of EU fertilising products and amending Regulations (EC) No 1069/2009 and (EC) No 1107/2009 and repealing Regulation (EC) No 2003/2003 (Text with EEA relevance)

Life cycle

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FprEN 18317
45.99 Dispatch of FV draft to CCMC
Jul 29, 2026