SIST EN ISO 15923-1:2025

SLOVENSKI STANDARD
01-marec-2025
Kakovost vode - Določanje izbranih parametrov s sistemi diskretne analize - 1. del:
amoniak, nitrat, nitrit, klorid, ortofosfat, sulfat in silikat s fotometrijsko detekcijo
(ISO 15923-1:2013)
Water quality - Determination of selected parameters by discrete analysis systems - Part
1: Ammonium, nitrate, nitrite, chloride, orthophosphate, sulfate and silicate with
photometric detection (ISO 15923-1:2013)
Wasserbeschaffenheit - Bestimmung von ausgewählten Parametern mittels
Einzelanalysensystemen - Teil1: Ammonium, Nitrat, Nitrit, Chlorid, Orthophosphat, Sulfat
und Silikat durch photometrische Detektion (ISO 15923-1:2013)
Qualité de l'eau - Détermination de paramètres sélectionnés par des systèmes d'analyse
discrète - Partie 1: Ammonium, nitrate, nitrite, chlorure, orthophosphate, sulfate et
silicate par détection photométrique (ISO 15923-1:2013)
Ta slovenski standard je istoveten z: EN ISO 15923-1:2024
ICS:
13.060.50 Preiskava vode na kemične Examination of water for
snovi chemical substances
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 15923-1
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2024
EUROPÄISCHE NORM
ICS 13.060.50
English Version
Water quality - Determination of selected parameters by
discrete analysis systems - Part 1: Ammonium, nitrate,
nitrite, chloride, orthophosphate, sulfate and silicate with
photometric detection (ISO 15923-1:2013)
Qualité de l'eau - Détermination de paramètres Wasserbeschaffenheit - Bestimmung von ausgewählten
sélectionnés par des systèmes d'analyse discrète - Parametern mittels Einzelanalysensystemen - Teil1:
Partie 1: Ammonium, nitrate, nitrite, chlorure, Ammonium, Nitrat, Nitrit, Chlorid, Orthophosphat,
orthophosphate, sulfate et silicate par détection Sulfat und Silikat durch photometrische Detektion (ISO
photométrique (ISO 15923-1:2013) 15923-1:2013)
This European Standard was approved by CEN on 5 August 2024.

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 CEN-CENELEC 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 CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15923-1:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
The text of ISO 15923-1:2013 has been prepared by Technical Committee ISO/TC 147 "Water quality”
of the International Organization for Standardization (ISO) and has been taken over as EN ISO 15923-
1:2024 by 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 February 2025, and conflicting national standards
shall be withdrawn at the latest by February 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 15923-1:2013 has been approved by CEN as EN ISO 15923-1:2024 without any
modification.
INTERNATIONAL ISO
STANDARD 15923-1
First edition
2013-12-15
Water quality — Determination of
selected parameters by discrete
analysis systems —
Part 1:
Ammonium, nitrate, nitrite, chloride,
orthophosphate, sulfate and silicate
with photometric detection
Qualité de l’eau — Détermination de paramètres sélectionnés par des
systèmes d’analyse discrète —
Partie 1: Ammonium, nitrate, nitrite, chlorure, orthophosphate,
sulfate et silicate par détection photométrique
Reference number
ISO 15923-1:2013(E)
©
ISO 2013
ISO 15923-1:2013(E)
© ISO 2013
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Published in Switzerland
ii © ISO 2013 – All rights reserved

ISO 15923-1:2013(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Interferences . 2
5 Reagents . 2
6 Apparatus . 2
7 Sampling and sample preparation . 2
8 Calibration . 3
8.1 Calibration function . 3
8.2 Calibration validity check . 3
9 Procedure. 3
10 Calculation . 4
11 Expression of results . 4
12 Test report . 4
Annex A (normative) Correction for inherent colour . 6
Annex B (normative) Determination of ammonium . 7
Annex C (normative) Determination of the sum of nitrate and nitrite by the hydrazine method .9
Annex D (normative) Determination of nitrite .12
Annex E (normative) Determination of chloride by the thiocyanate method .14
Annex F (normative) Determination of orthophosphate .16
Annex G (normative) Determination of sulfate by the turbidimetric method .19
Annex H (normative) Determination of silicate .21
Annex I (informative) Performance data .23
Bibliography .25
ISO 15923-1:2013(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committee responsible for this document is ISO/TC 147, Water quality, Subcommittee SC 2, Physical,
chemical and biochemical methods.
ISO 15923 consists of the following parts, under the general title Water quality — Determination of
selected parameters by discrete analysis systems:
— Part 1: Ammonium, nitrate, nitrite, chloride, orthophosphate, sulfate and silicate with photometric detection
iv © ISO 2013 – All rights reserved

ISO 15923-1:2013(E)
Introduction
Many photometric determinations can be automated with a discrete analysis system. With one single
apparatus, a large number of different parameters can be determined, and the parameters to be determined
can be specified for each sample. Working with small volumes requires less sample material and reagent.
Samples that fall be
...