Fertilizers. Determination of N-(n-Butyl)thiophosphoric acid triamide (NBPT) and N-(n-Propyl)thiophosphoric acid triamide (NPPT). Method using high-performance liquid chromatography (HPLC)1 Scope This European Standard specifies a method for the quantitative determination of the urease inhibitors N (n Butyl)thiophosphoric acid triamide (NBPT, CAS No. 94317 64 3) and N (n Propyl)thiophosphoric acid triamide (NPPT, CAS No. 916809 14 8) content in urea based fertilizers using high performance liquid chromatography (HPLC).

ramp or stair

The high-pressure liquid chromatography technique is limited to the determination of technical mixtures of decabromodiphenyl ether

The best practice guidance as outlined in BS EN 60851-6 helps you to test efficiency of winding wires and increase their durability

unlatched single doors

during eclipses)

combine biological and physical treatment

With obedience and compliance to BS G 257-2

BS EN 60444-9 contains the appropriate inspection and test schedules and also specifies the data documentation requirements

Composite structural members where the interaction between dissimilar materials are an integral part of the structural behaviour such as sandwich panels and composite floors are not covered by this standard

4 Production testing

BS EN 14025:2008  contains:

Learn more about 8680:2020 by checking out our Webinar replay:  Introducing BS 8680:2020: An on-demand webinar