To our valued customers,
At last:
Beuth Verlag is now DIN Media.
You can find out more about our new name and the reasons behind it here.
To use our new website without any hiccups, please clear your browser cache.
Yours sincerely,
DIN Media
Standard [CURRENT]
Product information on this site:
Quick delivery via download or delivery service
All transactions are encrypted
The European Standard has been prepared under the mandate M/418 given to CEN by the European Commission. It contains a method for the determination of N-(2-nitrophenyl)phosphoric triamide (2-NPT) in urea or in fertilizers containing urea using reversed phase HPLC. The sample fertilizer is dissolved in water or extracted with water and the 2-NPT content in the solution is determined using high-performance liquid chromatography (HPLC) with an UV detector. The method has been validated on the European level in an inter-laboratory test with 11 participating laboratories. The statistical results of this inter-laboratory test are given in informative Annex A. The standard has been prepared by CEN/TC 260 "Fertilizers and liming materials" (secretariat: DIN). The national Mirror Committee is Working Committee NA 057-03-02 AA "Düngemittel" ("Fertilizers") of NAL.