NF EN ISO 15587-2

NF EN ISO 15587-2

May 2002
Standard Current mandatory application standard
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Water quality - Digestion for the determination of selected elements in water - Part 2 : nitric acid digestion

This part of ISO 15587 specifies a method for extracting trace elements from a water sample using nitric acid as a digestion agent. The method is applicable to all types of waters with a suspended solids concentration of less than 20 g/l and a total organic carbon (TOC) concentration expressed as carbon of less than 5 g/l. The nitric acid digestion method is empirical and it might not necessarily release elements completely. However, for most environmental applications the result is fit for purpose. Nitric acid digestion is suitable for the release of: Al*, As, B, Ba*, Be*, Ca, Cd, Co, Cr*, Cu, Fe*, Hg, K, Mg*, Mn, Mo, Na, Ni, P, Pb, Se, Sr, Tl, V*, Zn (asterisk indicates a possible lower recovery compared to the aqua regia digestion method specified in ISO 15587-1). It is suitable for the release of Ag only if the sample is stabilized immediately after digestion. Nitric acid digestion is not suitable for Sb, Sn and for the digestion of refractory compounds such as SiO 2, TiO2 and Al2O3. The method is generic and may be implemented using a wide variety of equipment provided the digestion composition is unchanged, the digestion temperature is known, and the digestion duration is in accordance with this temperature.

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Main informations

Collections

National standards and national normative documents

Publication date

May 2002

Number of pages

26 p.

Reference

NF EN ISO 15587-2

ICS Codes

13.060.50   Examination of water for chemical substances

Classification index

T90-137-2

Print number

1 - 07/12/2002

International kinship

ISO 15587-2:2002

European kinship

EN ISO 15587-2:2002
Sumary
Water quality - Digestion for the determination of selected elements in water - Part 2 : nitric acid digestion

This part of ISO 15587 specifies a method for extracting trace elements from a water sample using nitric acid as a digestion agent. The method is applicable to all types of waters with a suspended solids concentration of less than 20 g/l and a total organic carbon (TOC) concentration expressed as carbon of less than 5 g/l.

The nitric acid digestion method is empirical and it might not necessarily release elements completely. However, for most environmental applications the result is fit for purpose.

Nitric acid digestion is suitable for the release of: Al*, As, B, Ba*, Be*, Ca, Cd, Co, Cr*, Cu, Fe*, Hg, K, Mg*, Mn, Mo, Na, Ni, P, Pb, Se, Sr, Tl, V*, Zn (asterisk indicates a possible lower recovery compared to the aqua regia digestion method specified in ISO 15587-1). It is suitable for the release of Ag only if the sample is stabilized immediately after digestion. Nitric acid digestion is not suitable for Sb, Sn and for the digestion of refractory compounds such as SiO 2, TiO2 and Al2O3.

The method is generic and may be implemented using a wide variety of equipment provided the digestion composition is unchanged, the digestion temperature is known, and the digestion duration is in accordance with this temperature.

Table of contents
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  • Avant-propos
    iv
  • 1
    Domaine d'application 1
  • 2
    Références normatives 1
  • 3
    Termes et définitions 2
  • 4
    Principe 2
  • 5
    Réactifs 2
  • 6
    Appareillage 2
  • 7
    Échantillonnage 3
  • 8
    Mode opératoire 3
  • 9
    Rapport d'essai 6
  • Annexe A (informative) Digestion dans un système ouvert avec chauffage électrique
    7
  • Annexe B (informative) Digestion dans un système ouvert avec chauffage aux micro-ondes
    9
  • Annexe C (informative) Digestion dans un système fermé avec chauffage aux micro-ondes
    11
  • Annexe D (informative) Digestion dans un système fermé utilisant un autoclave
    15
  • Annexe E (informative) Contrôle des performances
    17
  • Bibliographie
    17
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