Reference number
ISO 20620:2021
International Standard
ISO 20620:2021
Fertilizers and soil conditioners — Determination of total nitrogen by combustion
Edition 1
2021-09
Preview
ISO 20620:2021
78897
No disponible en español
Publicado (Edición 1, 2021)

ISO 20620:2021

ISO 20620:2021
78897
Idioma
Formato
CHF 42
Convertir Franco suizo (CHF) a tu moneda

Resumen

This document specifies a method for the determination of total nitrogen content in all nitrogen containing fertilizers by combustion method.

NOTE 1   The presence of non-nutritive sources of nitrogen (e.g. chelating agents) causes positive bias to samples being analysed for nutritive nitrogen content. The non-nutritive nitrogen content is subtracted from the total nitrogen value to determine the nutritive nitrogen content.

NOTE 2   Common internationally traded fertilizers were evaluated for total nitrogen by combustion analysis in the ring-study in this document. While the fertilizers analysed in this international ring study were mineral fertilizers, previous studies have shown that total nitrogen by combustion is suitable for use with many non-mineral, nitrogen-containing fertilizers.

Informaciones generales

  •  : Publicado
     : 2021-09
    : Norma Internacional publicada [60.60]
  •  : 1
     : 5
  • ISO/TC 134
    65.080 
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