EN ISO 15587-2:2002

SLOVENSKI STANDARD
01-maj-2003
.DNRYRVWYRGH5D]NORS]DGRORþHYDQMHL]EUDQLKHOHPHQWRYYYRGLGHO
5D]NORS]GXãLNRYR9NLVOLQR,62
Water quality - Digestion for the determination of selected elements in water - Part 2:
Nitric acid digestion (ISO 15587-2:2002)
Wasserbeschaffenheit - Aufschluss für die Bestimmung ausgewählter Elemente in
Wasser - Teil 2: Salpetersäure-Aufschluss (ISO 15587-2:2002)
Qualité de l'eau - Digestion pour la détermination de certains éléments dans l'eau -
Partie 2: Digestion a l'acide nitrique (ISO 15587-2:2002)
Ta slovenski standard je istoveten z: EN ISO 15587-2:2002
ICS:
13.060.50 3UHLVNDYDYRGHQDNHPLþQH Examination of water for
VQRYL chemical substances
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 15587-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2002
ICS 13.060.50
English version
Water quality - Digestion for the determination of selected
elements in water - Part 2: Nitric acid digestion (ISO 15587-
2:2002)
Qualité de l'eau - Digestion pour la détermination de Wasserbeschaffenheit - Aufschluss für die Bestimmung
certains éléments dans l'eau - Partie 2: Digestion à l'acide ausgewählter Elemente in Wasser - Teil 2: Salpetersäure-
nitrique (ISO 15587-2:2002) Aufschluss (ISO 15587-2:2002)
This European Standard was approved by CEN on 1 March 2002.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
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Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15587-2:2002 E
worldwide for CEN national Members.

CORRECTED  2002-04-17
Foreword
This document (ISO 15587-2:2002) has been prepared by Technical Committee ISO/TC 147
"Water quality" in collaboration with Technical Committee CEN/TC 230 "Water analysis", the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication
of an identical text or by endorsement, at the latest by September 2002, and conflicting
national standards shall be withdrawn at the latest by September 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the
United Kingdom.
Endorsement notice
The text of the International Standard ISO 15587-2:2002 has been approved by CEN as a
European Standard without any modifications.
NOTE  Normative references to International Standards are listed in annex ZA (normative).
Annex ZA
(normative)
Normative references to International Publicationswith their relevant
European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text, and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions
of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE  Where an International Publication has been modified by common modifications,
indicated by (mod.), the relevant EN/HD applies.
Publication Year Title EN/HD Year
ISO 3696 1987 Water for analytical laboratory use — EN ISO 3696 1995
Specifications and test methods
ISO 5667-3 1994 Water quality – Sampling – Part 3: Guidance EN ISO 5667-3 1995
on the preservation and handling of samples
INTERNATIONAL ISO
STANDARD 15587-2
First edition
2002-03-01
Water quality — Digestion for the
determination of selected elements in
water —
Part 2:
Nitric acid digestion
Qualité de l'eau — Digestion pour la détermination de certains éléments
dans l'eau —
Partie 2: Digestion à l'acide nitrique

Reference number
ISO 15587-2:2002(E)
©
ISO 2002
ISO 15587-2:2002(E)
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ii © ISO 2002 – All rights reserved

ISO 15587-2:2002(E)
Contents Page
Foreword.iv
1 Scope .1
2 Normative references.1
3 Term and definition .2
4 Principle.2
5 Reagents.2
6 Apparatus .2
7 Sampling.3
8 Procedure .3
9 Test report .5
Annex A (informative) Digestion in an open system using electrical heating.6
Annex B (informative) Digestion in an open system using microwave-assisted heating .8
Annex C (informative) Digestion in a closed system using microwave assisted heating.10
Annex D (informative) Digestion in a closed system using an autoclave.14
Annex E (informative) Performance checks.16
Bibliography.17

ISO 15587-2:2002(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
The main task of technical committees is to prepare International Standards. Draft International Standards adopted
by the technical committees are circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this part of ISO 15587 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 15587-2 was prepared by Technical Committee ISO/TC 147, Water quality, Subcommittee SC 2, Physical,
chemical and biochemical method.
ISO 15587 consists of the following parts, under the general title Water quality — Digestion for the determination of
selected elements in water:
 Part 1: Aqua regia digestion
 Part 2: Nitric acid digestion
Annexes A to E of this part of ISO 15587 are for information only.

iv © ISO 2002 – All rights reserved

INTERNATIONAL STANDARD ISO 15587-2:2002(E)

Water quality — Digestion for the determination of selected
elements in water —
Part 2:
Nitric acid digestion
WARNING — Persons using this part of ISO 15587 should be familiar with normal laboratory practice. This
part of ISO 15587 does not purport to address all of the safety problems, if any, associated with its use. It is
the responsibility of the user to establish appropriate safety and health practices and to ensure compliance
with any national regulatory conditions.
1 Scope
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 aqua regia digestion
method specified in ISO 15587-1, see reference [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 , TiO and Al O .
2 2 2 3
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.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 15587. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 15587 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 3696:1987, Water for analytical laboratory use — Specification and test methods
ISO 5667-3:1994; Water quality — Sampling — Part 3: Guidance on the preservation and handling of samples
ISO 15587-2:2002(E)
3 Term and definition
For the purposes of this part of ISO 15587, the following term and definition applies.
3.1
wet digestion
treatment with reactive liquid chemicals with the aim of bringing analytes into solution so as to be suitable for
subsequent analysis
NOTE The degree to which analytes are brought into solution suitable for subsequent analysis may depend on the
principle of the subsequent analysis. Some analytical methods require the element in solution independent of its chemical state,
others require a specific valence or a specific ionic species, for instance hydride atomic spectrometry, photometry and
[4]
electrochemical methods. For the latter, special attention should be paid to the presence of chemically stable organometals .
4 Pr
...