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prEN 18317

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

Draft Public enquiry
Comment end date 2026-04-28
Export comments Read draft and comment

Project stage codes

1. Decision on WI Proposal
2. Projektas
3. Viešoji apklausa
From 2026-02-27 till 2026-04-28
4. Closure of enquiry
5. Submission to Formal Vote

Organisation

CEN Europos standartizacijos komitetas

ICS

65.080 - Fertilizers

Technical Committee

TK 57 Fertilizers

ForeignTC'S

CEN/TC 260

Number of comments

0

Comment start date

2026-02-27

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.