Water quality - Determination of free chlorine and total chlorine - Part 2: Colorimetric method using N,N-dialkyl-1,4-phenylenediamine, for routine control purposes (ISO 7393-2:2017)

ISO 7393-2:2017 specifies a method for the determination of free chlorine and total chlorine in water, readily applicable to lab- and field-testing. It is based on measurement of the absorption, the red DPD colour complex in a photometer or the colour intensity by visual comparison of the colour with a scale of standards that is regularly calibrated.
This method is appropriate for drinking water and other waters, where additional halogens like bromine, iodine and other oxidizing agents are present in almost negligible amounts. Seawater and waters containing bromides and iodides comprise a group for which special procedures are to be carried out.
This method is in practice applicable to concentrations, in terms of chlorine (Cl2), from, for example, 0,000 4 mmol/l to 0,07 mmol/l (e.g. 0,03 mg/l to 5 mg/l) total chlorine. For higher concentrations, the test portion is diluted.
Commonly, the method is applied as a field method with mobile photometers and commercially available ready-for-use reagents (liquid reagents, powders and tablets). It is essential that those reagents comply with minimum requirements and contain the essential reagents and a buffer system suitable to adjust the measurement solution to a pH range of typically 6,2 to 6,5. If there is doubt that water samples have uncommon pH values and/or buffer capacities, the user has to check and, if necessary, to adjust the sample pH to the required range. The pH of the sample is within the range of pH 4 and 8. Adjust, if necessary, with sodium hydroxide solution or sulfuric acid before the test.
A procedure for the differentiation of combined chlorine of the monochloramine type, combined chlorine of the dichloramine type and combined chlorine in the form of nitrogen trichloride is presented in Annex A. In Annex C, a procedure is presented for the determination of free and total chlorine in drinking and other low polluted waters, for disposable planar reagent-filled cuvettes using a mesofluidic channel pump/colorimeter.

Wasserbeschaffenheit - Bestimmung von freiem Chlor und Gesamtchlor - Teil 2: Kolorimetrisches Verfahren mit N,N-Diethyl-1,4-Phenylendiamin für Routinekontrollen (ISO 7393-2:2017)

Qualité de l'eau - Dosage du chlore libre et du chlore total - Partie 2: Méthode colorimétrique à la N,N-diéthylphénylène-1,4 diamine destinée aux contrôles de routine (ISO 7393-2:2017)

ISO 7393-2:2017 spécifie une méthode de dosage du chlore libre et du chlore total dans l'eau, aisément applicable dans le cadre d'essais en laboratoire et sur le terrain. Elle est basée sur le mesurage de l'absorption du composé DPD rouge dans un photomètre ou sur le mesurage de l'intensité de la couleur par comparaison visuelle de la couleur avec une échelle d'étalons régulièrement calibrée.
Cette méthode convient pour l'eau potable et d'autres eaux, où des halogènes supplémentaires comme le brome et l'iode, et d'autres agents oxydants sont présents dans des quantités presque négligeables. L'eau de mer et les eaux contenant des bromures et des iodures constituent un groupe nécessitant la mise en ?uvre de procédés particuliers.
Cette méthode est applicable dans la pratique à des concentrations, en termes de chlore (Cl2), comprises par exemple entre 0,000 4 mmol/l et 0,07 mmol/l (c'est-à-dire entre 0,03 mg/l et 5 mg/l) pour le chlore total. À plus forte concentration, la prise d'essai est diluée.
En général, la méthode est appliquée en tant que méthode de terrain avec des photomètres mobiles et des réactifs prêts à l'emploi disponibles dans le commerce (réactifs liquides, poudres et tablettes). Il est essentiel que ces réactifs satisfassent aux exigences minimales, et qu'ils comportent les réactifs essentiels et un système tampon permettant d'ajuster le pH de la solution de mesure sur une gamme généralement comprise entre 6,2 et 6,5. En cas de doute concernant les valeurs de pH et/ou les pouvoirs tampon inhabituels que pourraient présenter les échantillons d'eau, l'utilisateur doit contrôler et, si nécessaire, ajuster le pH de l'échantillon à la gamme requise. Le pH de l'échantillon doit être compris entre 4 et 8. Procéder, si nécessaire, à un ajustement au moyen d'acide sulfurique ou d'une solution d'hydroxyde de sodium avant l'essai.
Une méthode permettant la différenciation du chlore combiné de type monochloramine, du chlore combiné de type dichloramine et du chlore combiné sous forme de trichlorure d'azote est présentée à l'Annexe A. L'Annexe C présente quant à elle un mode opératoire pour le dosage du chlore libre et du chlore total dans les eaux de boisson et les autres types d'eau faiblement polluée, avec des cuves planes à usage unique remplies de réactif, utilisées avec une pompe ou un colorimètre à canal mésofluidique.

Kakovost vode - Določevanje prostega in celotnega klora - 2. del: Kolorimetrijska metoda z N,N-dialkil-1,4-fenilendiaminom za redno kontrolo (ISO 7393-2:2017)

Ta dokument določa metodo za določevanje prostega in celotnega klora v vodi, ki je zlahka uporabna pri laboratorijskem preskušanju in preskušanju na terenu. Temelji na meritvi absorpcije, rdečem barvnem kompleksu DPD
v fotometru ali barvni intenziteti prek vizualnega primerjanja barve z lestvico
standardov, ki se redno umerja.
Ta metoda je primerna za pitno in drugo vodo, kjer so dodatni halogeni, kot so brom, jod in drugi oksidanti, prisotni v skoraj zanemarljivih količinah. Morska voda in voda, ki vsebuje bromide in jodide, sestavljata skupino, za katero se morajo izvesti posebni postopki.
Ta metoda se v praksi uporablja za koncentracije klora (Cl2) od na primer 0,0004 mmol/l do 0,07 mmol/l (npr. 0,03 mg/l do 5 mg/l) celotnega klora. Pri višjih koncentracijah se preskusna količina razredči.
Metoda se običajno uporablja na terenu z mobilnimi fotometri in komercialno razpoložljivimi reagenti, pripravljenimi za uporabo (tekoči reagenti, praški in tablete). Ključnega pomena je, da so ti reagenti skladni z minimalnimi zahtevami in da vsebujejo bistvene reagente ter blažilni sistem, primeren za prilagajanje merilne raztopine na razpon pH, ki je običajno med 6,2 in 6,5. Če obstajajo dvomi o tem, ali vzorci vode vključujejo neobičajne vrednosti pH in/ali zmogljivosti blažilnika, mora uporabnik preveriti in po potrebi prilagoditi vzorčni pH na ustrezen razpon. Vrednost pH vzorca je v razponu med pH 4 in 8. Po potrebi pred preskusom prilagodite z raztopino natrijevega hidroksida ali žveplove kisline.
Postopek za diferenciacijo sestavljenega klora monokloraminskega tipa, sestavljenega klora dikloraminskega tipa in sestavljenega klora v obliki dušikovega triklorida je opisan v dodatku A. V dodatku C je opisan postopek za določevanje prostega in celotnega klora v pitni in drugi vodi z nizko stopnjo onesnaženja, za ravne kivete za enkratno uporabo, napolnjene z reagentom z uporabo
črpalke/kolorimetra mezofluidnega kanala.

General Information

Status
Published
Publication Date
30-Jan-2018
Withdrawal Date
30-Jul-2018
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
31-Jan-2018
Completion Date
31-Jan-2018

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Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 7393-2:2018
01-junij-2018
1DGRPHãþD
SIST EN ISO 7393-2:2000
.DNRYRVWYRGH'RORþHYDQMHSURVWHJDLQFHORWQHJDNORUDGHO.RORULPHWULMVND
PHWRGD]11GLDONLOIHQLOHQGLDPLQRP]DUHGQRNRQWUROR ,62
Water quality - Determination of free chlorine and total chlorine - Part 2: Colorimetric
method using N,N-dialkyl-1,4-phenylenediamine, for routine control purposes (ISO 7393-
2:2017)
Wasserbeschaffenheit - Bestimmung von freiem Chlor und Gesamtchlor - Teil 2:
Kolorimetrisches Verfahren mit N,N-Diethyl-1,4-Phenylendiamin für Routinekontrollen
(ISO 7393-2:2017)
Qualité de l'eau - Dosage du chlore libre et du chlore total - Partie 2: Méthode
colorimétrique à la N,N-diéthylphénylène-1,4 diamine destinée aux contrôles de routine
(ISO 7393-2:2017)
Ta slovenski standard je istoveten z: EN ISO 7393-2:2018
ICS:
13.060.50 3UHLVNDYDYRGHQDNHPLþQH Examination of water for
VQRYL chemical substances
SIST EN ISO 7393-2:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO 7393-2:2018

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SIST EN ISO 7393-2:2018


EN ISO 7393-2
EUROPEAN STANDARD

NORME EUROPÉENNE

January 2018
EUROPÄISCHE NORM
ICS 13.060.50 Supersedes EN ISO 7393-2:2000
English Version

Water quality - Determination of free chlorine and total
chlorine - Part 2: Colorimetric method using N,N-dialkyl-
1,4-phenylenediamine, for routine control purposes (ISO
7393-2:2017)
Qualité de l'eau - Dosage du chlore libre et du chlore Wasserbeschaffenheit - Bestimmung von freiem Chlor
total - Partie 2: Méthode colorimétrique à la N,N- und Gesamtchlor - Teil 2: Kolorimetrisches Verfahren
diéthylphénylène-1,4 diamine destinée aux contrôles mit N,N-Diethyl-1,4-Phenylendiamin für
de routine (ISO 7393-2:2017) Routinekontrollen (ISO 7393-2:2017)
This European Standard was approved by CEN on 9 December 2017.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey 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
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 7393-2:2018 E
worldwide for CEN national Members.

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SIST EN ISO 7393-2:2018
EN ISO 7393-2:2018 (E)
Contents Page
European foreword . 3

2

---------------------- Page: 4 ----------------------

SIST EN ISO 7393-2:2018
EN ISO 7393-2:2018 (E)
European foreword
This document (EN ISO 7393-2:2018) 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 July 2018, and conflicting national standards shall be
withdrawn at the latest by July 2018.
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.
This document supersedes EN ISO 7393-2:2000.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
...

SLOVENSKI STANDARD
oSIST prEN ISO 7393-2:2017
01-maj-2017
.DNRYRVWYRGH'RORþHYDQMHSURVWHJDLQFHORWQHJDNORUDGHO.RORULPHWULMVND
PHWRGD]XSRUDER11GLHWLOIHQLOHQGLDPLQD]DSRWUHEHUHGQHNRQWUROH ,62',6

Water quality - Determination of free chlorine and total chlorine - Part 2: Colorimetric
method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes (ISO/DIS
7393-2)
Wasserbeschaffenheit - Bestimmung von freiem Chlor und Gesamtchlor - Teil 2:
Kolorimetrisches Verfahren mit N,N-Diethyl-1,4-Phenylendiamin für Routinekontrollen
Qualité de l'eau - Dosage du chlore libre et du chlore total - Partie 2: Méthode
colorimétrique à la N,N-diéthylphénylène-1,4 diamine destinée aux contrôles de routine
Ta slovenski standard je istoveten z: prEN ISO 7393-2
ICS:
13.060.50 3UHLVNDYDYRGHQDNHPLþQH Examination of water for
VQRYL chemical substances
oSIST prEN ISO 7393-2:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 7393-2:2017

---------------------- Page: 2 ----------------------
oSIST prEN ISO 7393-2:2017
DRAFT INTERNATIONAL STANDARD
ISO/DIS 7393-2
ISO/TC 147/SC 2 Secretariat: DIN
Voting begins on: Voting terminates on:
2017-01-27 2017-04-20
Water quality — Determination of free chlorine and total
chlorine —
Part 2:
Colorimetric method using N,N-diethyl-1,4-
phenylenediamine, for routine control purposes
Qualité de l’eau — Dosage du chlore libre et du chlore total —
Partie 2: Méthode colorimétrique à la N,N-diéthylphénylène-1,4 diamine destinée aux contrôles de routine
ICS: 13.060.50
THIS DOCUMENT IS A DRAFT CIRCULATED
This document is circulated as received from the committee secretariat.
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 7393-2:2017(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2017

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oSIST prEN ISO 7393-2:2017
ISO/DIS 7393-2:2017(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
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ii © ISO 2017 – All rights reserved

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oSIST prEN ISO 7393-2:2017
ISO/DIS 7393-2:2017(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative References . 1
3 Terms and definitions . 2
4 Principle . 2
4.1 Determination of free chlorine. 2
4.2 Determination of total chlorine . 2
5 Interferences .
...

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