Dirvožemio gerinimo medžiagos ir auginimo terpės. Azoto kiekio nustatymas. 1 dalis. Modifikuotas Kjeldalio metodas

Komentavimo iki data 2025-12-30

Eksportuoti komentarus Skaityti, komentuoti projektą

Projekto etapai

1. Decision on WI Proposal

2. Projektas

3. Viešoji apklausa

Nuo 2025-10-31 iki 2025-12-30

4. Closure of enquiry

5. Submission to Formal Vote

Organizacija

CEN Europos standartizacijos komitetas

ICS

65.080 - Trąšos

Technikos komitetas

TK 57 Trąšos

Užsienio technikos komitetas

CEN/TC 223

Komentarų skaičius

Komentavimo pradžia

2025-10-31

Taikymo sritis

This European Standard specifies a method for the determination of nitrogen in soil improvers and growing media. The Kjeldahl method determines ammonium-N, nitrate-N, nitrite-N and organic N content of soil improvers and growing media. Nitrogen in N-N-linkages, N-O-linkages and some heterocyclics (especially pyridine) is only partially determined. [6], [7], [8] The method is not applicable to liming materials and preformed materials such as mineral wool slabs and foam slabs. NOTE The requirements of the standard may differ from the national legal requirements for the declaration of the products concerned.

Ryšiai

Pakeis

prEN 13654-1