Paper, board and pulps — Determination of conductivity of aqueous extracts

This document specifies a method for the determination of the conductivity of aqueous extracts of paper, board or pulp, these extracts having been prepared by a hot or cold method. The method is applicable to all kinds of paper, board and pulps, except for papers used for electrical purposes. For high purity papers used for electrical purposes, see method given in EN 60554‑2.

Papier, carton et pâtes — Détermination de la conductivité des extraits aqueux

General Information

Status
Published
Publication Date
03-Nov-2021
Current Stage
6060 - International Standard published
Start Date
04-Nov-2021
Completion Date
04-Nov-2021
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INTERNATIONAL ISO
STANDARD 6587
Third edition
2021-11
Paper, board and pulps —
Determination of conductivity of
aqueous extracts
Papier, carton et pâtes — Détermination de la conductivité des
extraits aqueux
Reference number
ISO 6587:2021(E)
© ISO 2021
---------------------- Page: 1 ----------------------
ISO 6587:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
© ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 6587:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction .................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ..................................................................................................................................................................................... 1

3 Terms and definitions .................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Reagents ........................................................................................................................................................................................................................ 2

5.1 Distilled or deionized water ....................................................................................................................................................... 2

5.2 Potassium chloride, standard solutions ........................................................................................................................... 2

5.2.1 0,01 mol/l solution ............................................................................................................................................................ 2

5.2.2 0,001 mol/l solution ........................................................................................................................................................ 2

6 Apparatus .................................................................................................................................................................................................................... 2

7 Sampling and sample preparation .................................................................................................................................................... 3

7.1 Sampling ....................................................................................................................................................................................................... 3

7.2 Sample preparation ............................................................................................................................................................................ 3

7.3 Determination of dry matter content ......... ........................................................................................................................ 3

8 Procedure ....................................................................................................................................................................................................................3

8.1 Determination of cell constant ................................................................................................................................................. 3

8.2 Preparation of the aqueous extract ..................................................................................................................................... 4

8.2.1 Weighing of sample .......................................................................................................................................................... 4

8.2.2 Hot extraction method .................................................................................................................................................. 4

8.2.3 Cold extraction method ................................................................................................................................................ 4

8.3 Determination of conductivity ................................................................................................................................................. 4

8.4 Blank test ..................................................................................................................................................................................................... 4

9 Calculation and expression of results ........................................................................................................................................... 4

9.1 If the meter gives conductance ................................................................................................................................................ 4

9.2 If the meter gives resistance ...................................................................................................................................................... 5

9.3 Expression of results ........................................................................................................................................... .............................. 5

10 Test report .................................................................................................................................................................................................................. 5

Bibliography ................................................................................................................................................................................................................................ 6

iii
© ISO 2021 – All rights reserved
---------------------- Page: 3 ----------------------
ISO 6587:2021(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 (see 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 (see 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.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to

the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see

www.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 6, Paper, board and pulps.

This third edition cancels and replaces the second edition (ISO 6587:1992), which has been technically

revised.
The main changes are as follows:
— editorial updates;
— requirement added to 7.1;
— bibliography update.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www.iso.org/members.html.
© ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 6587:2021(E)
Introduction

Conductivity measurement provides an indication of the level of residual ionic impurities in pulp. It can

thus be used, for example, to assess the effectiveness of washing in the pulp and paper manufacturing

process.
© ISO 2021 – All rights reserved
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 6587:2021(E)
Paper, board and pulps — Determination of conductivity of
aqueous extracts
1 Scope

This document specifies a method for the determination of the conductivity of aqueous extracts of

paper, board or pulp, these extracts having been prepared by a hot or cold method.

The method is applicable to all kinds of paper, board and pulps, except for papers used for electrical

purposes. For high purity papers used for electrical purposes, see method given in EN 60554-2.

2 Normative references
The follo
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 6587
ISO/TC 6
Paper, board and pulps —
Secretariat: SCC
Determination of conductivity of
Voting begins on:
2021­08­10 aqueous extracts
Voting terminates on:
Papier, carton et pâtes — Détermination de la conductivité des
2021­10­05
extraits aqueux
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 SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 6587:2021(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2021
---------------------- Page: 1 ----------------------
ISO/FDIS 6587:2021(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2021

All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH­1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 6587:2021(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Reagents ........................................................................................................................................................................................................................ 2

5.1 Distilled or deionized water ........................................................................................................................................................ 2

5.2 Potassium chloride, standard solutions ............................................................................................................................ 2

5.2.1 0,01 mol/l solution ........................................................................................................................................................ 2

5.2.2 0,001 mol/l solution ..................................................................................................................................................... 2

6 Apparatus ..................................................................................................................................................................................................................... 2

7 Sampling and sample preparation .................................................................................................................................................... 3

7.1 Sampling ....................................................................................................................................................................................................... 3

7.2 Sample preparation ............................................................................................................................................................................ 3

7.3 Determination of dry matter content .................................................................................................................................. 3

8 Procedure..................................................................................................................................................................................................................... 3

8.1 Determination of cell constant .................................................................................................................................................. 3

8.2 Preparation of the aqueous extract ....................................................................................................................................... 4

8.2.1 Weighing of sample........................................................................................................................................................ 4

8.2.2 Hot extraction method ................................................................................................................................................ 4

8.2.3 Cold extraction method .............................................................................................................................................. 4

8.3 Determination of conductivity .................................................................................................................................................. 4

8.4 Blank test ..................................................................................................................................................................................................... 4

9 Calculation and expression of results ............................................................................................................................................. 4

9.1 If the meter gives conductance ................................................................................................................................................. 4

9.2 If the meter gives resistance ........................................................................................................................................................ 5

9.3 Expression of results .......................................................................................................................................................................... 5

10 Test report ................................................................................................................................................................................................................... 5

Bibliography ................................................................................................................................................................................................................................ 6

© ISO 2021 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/FDIS 6587:2021(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 non­governmental, 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 (see 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 (see 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.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 6, Paper, board and pulps.

This third edition cancels and replaces the second edition (ISO 6587:1992), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— editorial updates;
— requirement added to 7.1;
— bibliography update.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 6587:2021(E)
Introduction

Conductivity measurement provides an indication of the level of residual ionic impurities in pulp. It can

thus be used, for example, to assess the effectiveness of washing in the pulp and paper manufacturing

process.
© ISO 2021 – All rights reserved v
---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 6587:2021(E)
Paper, board and pulps — Determination of conductivity of
aqueous extracts
1 Scope
This document specifies a method for the
...

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