Paper, board, pulps and cellulosic nanomaterials - Determination of dry matter content by oven-drying method - Part 2: Suspensions of cellulosic nanomaterials (ISO 638-2:2021)

This document specifies an oven-drying method for the determination of the dry matter content
in suspensions of cellulosic nanomaterials. The procedure is applicable to cellulosic nanomaterial
suspensions which do not contain any appreciable quantities of materials other than water that are
volatile at the temperature of 105 °C ± 2 °C. It is used, for example, in the case of cellulosic nanomaterial
suspensions samples taken for chemical and physical tests in the laboratory, when a concurrent
determination of dry matter content is required.
NOTE 1 ISO 638-1[1] specifies the dry matter content in paper, board, pulp and cellulosic nanomaterials in solid
form, which all can be produced from virgin and/or recycled materials; ISO 287[2] specifies the determination of
moisture content of a lot of paper and board; ISO 4119[3] specifies the determination of stock concentration of
aqueous pulp suspensions; ISO 801 (all parts)[4] specifies the determination of saleable mass in lots.
NOTE 2 This document determines the total dry matter content of the sample, including any dissolved solids.
If only the cellulosic material content free of dissolved solids is desired, dissolved solids are removed prior to
measuring the dry matter content e.g. by washing or dialysis, taking care to retain all cellulosic material.

Papier, Pappe, Faserstoff und cellulosehaltige Nanomaterialien - Bestimmung des Trockengehaltes durch das Wärmeschrankverfahren - Teil 2: Suspensionen von cellulosehaltigen Nanomaterialien (ISO 638-2:2021)

Dieses Dokument legt ein Wärmeschrankverfahren für die Bestimmung des Trockengehaltes in Suspensionen von cellulosehaltigen Nanomaterialien fest. Das Verfahren ist anzuwenden für Suspensionen von cellulosehaltigen Nanomaterialien, die außer Wasser keine nennenswerten Mengen von Materialien enthalten, die bei einer Temperatur von 105 °C ± 2 °C flüchtig sind. Es wird z. B. im Fall von Durchschnittsproben aus Suspensionen von cellulosehaltigen Nanomaterialien verwendet, die für chemische und physikalische Prüfungen im Laboratorium entnommen werden, wenn eine gleichzeitige Bestimmung des Trockengehaltes erforderlich ist.
ANMERKUNG 1 ISO 638-1 [1] legt den Gesamttrockengehalt von Papier, Pappe, Papier und Pappe für das Recycling und von cellulosehaltigen Nanomaterialien in fester Form fest. ISO 287 [2] legt die Bestimmung des Feuchtegehaltes in einem Lieferposten Papier oder Pappe fest. ISO 4119 [3] legt die Bestimmung der Stoffdichte wässriger Faserstoff-Suspensionen fest. ISO 801 (alle Teile) [4] legt die Bestimmung des Handelsgewichtes von Lieferposten fest.
ANMERKUNG 2 Dieses Dokument dient der Bestimmung des Gesamttrockengehaltes der Durchschnittsprobe einschließlich jeglicher gelöster Feststoffe. Wird nur der Gehalt an cellulosehaltigem Material ohne die gelösten Feststoffe gewünscht, sollten gelöste Feststoffe vor der Messung des Trockengehaltes z. B. durch Waschen oder Dialyse entfernt werden, wobei darauf zu achten ist, dass das gesamte cellulosehaltige Material erhalten bleibt.

Papiers, cartons, pâtes et nanomatériaux cellulosiques - Détermination de la teneur en matières sèches par séchage à l'étuve - Partie 2: Suspensions de nanomatériaux cellulosiques (ISO 638-2:2021)

Papir, karton, lepenka in vlaknine ter celulozni nanomateriali - Določevanje suhe snovi - Metoda sušenja v sušilniku - 2. del: Suspenzije celuloznih nanomaterialov (ISO 638-2:2021)

General Information

Status
Published
Public Enquiry End Date
14-Jul-2020
Publication Date
29-Jun-2021
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
11-Jun-2021
Due Date
16-Aug-2021
Completion Date
30-Jun-2021

RELATIONS

Buy Standard

Standard
SIST EN ISO 638-2:2021
English language
17 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day
Draft
oSIST prEN ISO 638-2:2020
English language
14 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 638-2:2021
01-september-2021
Nadomešča:
SIST EN ISO 638:2009

Papir, karton, lepenka in vlaknine ter celulozni nanomateriali - Določevanje suhe

snovi - Metoda sušenja v sušilniku - 2. del: Suspenzije celuloznih nanomaterialov

(ISO 638-2:2021)

Paper, board, pulps and cellulosic nanomaterials - Determination of dry matter content

by oven-drying method - Part 2: Suspensions of cellulosic nanomaterials (ISO 638-

2:2021)
Papier, Pappe, Faserstoff und cellulosehaltige Nanomaterialien - Bestimmung des
Trockengehaltes durch das Wärmeschrankverfahren - Teil 2: Suspensionen von
cellulosehaltigen Nanomaterialien (ISO 638-2:2021)

Papiers, cartons, pâtes et nanomatériaux cellulosiques - Détermination de la teneur en

matières sèches par séchage à l'étuve - Partie 2: Suspensions de nanomatériaux
cellulosiques (ISO 638-2:2021)
Ta slovenski standard je istoveten z: EN ISO 638-2:2021
ICS:
85.040 Vlaknine Pulps
85.060 Papir, karton in lepenka Paper and board
SIST EN ISO 638-2:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 638-2:2021
---------------------- Page: 2 ----------------------
SIST EN ISO 638-2:2021
EN ISO 638-2
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2021
EUROPÄISCHE NORM
ICS 85.040; 85.060 Supersedes EN ISO 638:2008
English Version
Paper, board, pulps and cellulosic nanomaterials -
Determination of dry matter content by oven-drying
method - Part 2: Suspensions of cellulosic nanomaterials
(ISO 638-2:2021)

Papiers, cartons, pâtes et nanomatériaux cellulosiques Papier, Pappe, Faserstoff und cellulosehaltige

- Détermination de la teneur en matières sèches par Nanomaterialien - Bestimmung des Trockengehaltes

séchage à l'étuve - Partie 2: Suspensions de durch das Wärmeschrankverfahren - Teil 2:

nanomatériaux cellulosiques (ISO 638-2:2021) Suspensionen von cellulosehaltigen Nanomaterialien

(ISO 638-2:2021)
This European Standard was approved by CEN on 6 May 2021.

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, 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

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 638-2:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 638-2:2021
EN ISO 638-2:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

---------------------- Page: 4 ----------------------
SIST EN ISO 638-2:2021
EN ISO 638-2:2021 (E)
European foreword

This document (EN ISO 638-2:2021) has been prepared by Technical Committee ISO/TC 6 "Paper,

board and pulps" in collaboration with Technical Committee CEN/TC 172 “Pulp, paper and board” 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 November 2021, and conflicting national standards

shall be withdrawn at the latest by November 2021.

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 638:2008.

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, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 638-2:2021 has been approved by CEN as EN ISO 638-2:2021 without any modification.

---------------------- Page: 5 ----------------------
SIST EN ISO 638-2:2021
---------------------- Page: 6 ----------------------
SIST EN ISO 638-2:2021
INTERNATIONAL ISO
STANDARD 638-2
First edition
2021-05
Paper, board, pulps and cellulosic
nanomaterials — Determination of
dry matter content by oven-drying
method —
Part 2:
Suspensions of cellulosic
nanomaterials
Papiers, cartons, pâtes et nanomatériaux cellulosiques —
Détermination de la teneur en matières sèches par séchage à
l'étuve —
Partie 2: Suspensions de nanomatériaux cellulosiques
Reference number
ISO 638-2:2021(E)
ISO 2021
---------------------- Page: 7 ----------------------
SIST EN ISO 638-2:2021
ISO 638-2:2021(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
ii © ISO 2021 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 638-2:2021
ISO 638-2:2021(E)
Contents Page

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

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

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

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

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

4 Principle ........................................................................................................................................................................................................................ 2

5 Apparatus ..................................................................................................................................................................................................................... 2

6 Sampling ........................................................................................................................................................................................................................ 3

7 Preparation of test specimens ................................................................................................................................................................ 3

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

9 Calculation and expression of results ............................................................................................................................................. 5

10 Precision ....................................................................................................................................................................................................................... 5

11 Test report ................................................................................................................................................................................................................... 5

Annex A (informative) Calculation of the water content ................................................................................................................. 6

Annex B (informative) Precision ............................................................................................................................................................................... 7

Bibliography ................................................................................................................................................................................................................................ 9

© ISO 2021 – All rights reserved iii
---------------------- Page: 9 ----------------------
SIST EN ISO 638-2:2021
ISO 638-2:2021(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 the following

URL: www .iso .org/ iso/ foreword .html.

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

This first edition of ISO 638-2, together with ISO 638-1, cancels and replaces ISO 638:2008, which has

been technically revised. The main changes compared to the previous edition are as follows:

— inclusion of cellulosic nanomaterials and paper and board for recycling in the scope;

— splitting of the standard in two parts;
— technical revision of the procedure;
— editorial revision of the document;
— update of precision clause.

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: 10 ----------------------
SIST EN ISO 638-2:2021
ISO 638-2:2021(E)
Introduction

Determination of dry matter content and water content are carried out for different purposes.

This document is used when the dry matter content is needed to calculate the results for chemical

analysis or physical testing, or to determine the water content of cellulosic nanomaterial suspensions.

[1]

ISO 638-1 is dedicated to the determination of the dry matter content or moisture content in paper,

board, pulp and cellulosic nanomaterials in solid form, which all may be produced from virgin and/or

recycled materials.
[2]

ISO 287 is used for the purpose of determining the average moisture content and the variation in

moisture content (maximum and minimum values) of a lot of paper and board. In the converting of

paper and board, moisture content is important as it can have an effect on processes such as printing

and copying. Moisture content can have an effect on curl and dimensional stability.

[3]

ISO 4119 is used in laboratory procedures or is referred to in other International Standards in which

the stock concentration of an aqueous pulp suspension requires determination.
© ISO 2021 – All rights reserved v
---------------------- Page: 11 ----------------------
SIST EN ISO 638-2:2021
---------------------- Page: 12 ----------------------
SIST EN ISO 638-2:2021
INTERNATIONAL STANDARD ISO 638-2:2021(E)
Paper, board, pulps and cellulosic nanomaterials —
Determination of dry matter content by oven-drying
method —
Part 2:
Suspensions of cellulosic nanomaterials
1 Scope

This document specifies an oven-drying method for the determination of the dry matter content

in suspensions of cellulosic nanomaterials. The procedure is applicable to cellulosic nanomaterial

suspensions which do not contain any appreciable quantities of materials other than water that are

volatile at the temperature of 105 °C ± 2 °C. It is used, for example, in the case of cellulosic nanomaterial

suspensions samples taken for chemical and physical tests in the laboratory, when a concurrent

determination of dry matter content is required.
[1]

NOTE 1 ISO 638-1 specifies the dry matter content in paper, board, pulp and cellulosic nanomaterials in solid

[2]

form, which all can be produced from virgin and/or recycled materials; ISO 287 specifies the determination of

[3]

moisture content of a lot of paper and board; ISO 4119 specifies the determination of stock concentration of

[4]

aqueous pulp suspensions; ISO 801 (all parts) specifies the determination of saleable mass in lots.

NOTE 2 This document determines the total dry matter content of the sample, including any dissolved solids.

If only the cellulosic material content free of dissolved solids is desired, dissolved solids are removed prior to

measuring the dry matter content e.g. by washing or dialysis, taking care to retain all cellulosic material.

2 Normative references
There are no normative references in this document.
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
cellulosic nanomaterial
CNM

material composed predominantly of cellulose, with any external dimension in the nanoscale (3.5), or a

material having internal structure or surface structure in the nanoscale, with the internal structure or

surface structure composed predominantly of cellulose

Note 1 to entry: The terms nanocellulose (NC) and cellulose nanomaterial (CNM) are

...

SLOVENSKI STANDARD
oSIST prEN ISO 638-2:2020
01-september-2020

Papir, karton, lepenka in vlaknine ter celulozni nanomateriali - Določevanje suhe

snovi z metodo sušenja v sušilniku - 2. del: Suspenzije celuloznih nanomaterialov

(ISO/DIS 638-2:2020)

Paper, board, pulps and cellulosic nanomaterials - Determination of dry matter content

by oven-drying method - Part 2: Suspensions of cellulosic nanomaterials (ISO/DIS 638-

2:2020)
Papier, Pappe, Faserstoff und cellulosehaltige Nanomaterialien - Bestimmung des
Trockengehaltes durch das Wärmeschrankverfahren - Teil 2: Suspensionen von
cellulosehaltigen Nanomaterialien (ISO/DIS 638-2:2020)

Papiers, cartons, pâtes et nanomatériaux cellulosiques - Détermination de la teneur en

matières sèches par séchage à l'étuve - Partie 2: Suspensions de nanomatériaux
cellulosiques (ISO/DIS 638-2:2020)
Ta slovenski standard je istoveten z: prEN ISO 638-2
ICS:
85.040 Vlaknine Pulps
85.060 Papir, karton in lepenka Paper and board
oSIST prEN ISO 638-2:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 638-2:2020
---------------------- Page: 2 ----------------------
oSIST prEN ISO 638-2:2020
DRAFT INTERNATIONAL STANDARD
ISO/DIS 638-2
ISO/TC 6 Secretariat: SCC
Voting begins on: Voting terminates on:
2020-07-02 2020-09-24
Paper, board, pulps and cellulosic nanomaterials —
Determination of dry matter content by oven-drying
method —
Part 2:
Suspensions of cellulosic nanomaterials
ICS: 85.040; 85.060
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 638-2:2020(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 2020
---------------------- Page: 3 ----------------------
oSIST prEN ISO 638-2:2020
ISO/DIS 638-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

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
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 4 ----------------------
oSIST prEN ISO 638-2:2020
ISO/DIS 638-2:2020(E)
Contents Page

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

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

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

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

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

4 Principle ........................................................................................................................................................................................................................ 3

5 Apparatus ..................................................................................................................................................................................................................... 3

6 Sampling ........................................................................................................................................................................................................................ 3

7 Preparation of test specimens ................................................................................................................................................................ 3

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

9 Expression of results ........................................................................................................................................................................................ 5

9.1 Calculation .................................................................................................................................................................................................. 5

10 Precision ....................................................................................................................................................................................................................... 5

11 Test report ................................................................................................................................................................................................................... 5

Annex A (informative) Calculation of the water content ................................................................................................................. 6

Annex B (informative) Precision ............................................................................................................................................................................... 7

Bibliography ................................................................................................................................................................................................................................ 9

© ISO 2020 – All rights reserved iii
---------------------- Page: 5 ----------------------
oSIST prEN ISO 638-2:2020
ISO/DIS 638-2:2020(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 on 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 the following

URL: 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 638:2008), which has been technically

revised.
The main changes compared to the previous edition are as follows:

— Introduction of cellulosic nanomaterials and paper and board for recycling in the scope

— Split of the standard in two parts
— Technical revision of the procedure
— Editorial revision of the document
— Update of precision clause
iv © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
oSIST prEN ISO 638-2:2020
ISO/DIS 638-2:2020(E)
Introduction

Determination of dry matter content and water content are carried out for different purposes.

This part of International Standard ISO 638 (ISO 638-2) is used when the dry matter content is needed

to calculate the results for chemical analysis or physical testing, or to determine the water content of

cellulosic nanomaterial suspensions.

Part 1 of International Standard ISO 638 (ISO 638-1) [1] is dedicated to the determination of the dry

matter content or moisture content of paper, board, paper and board for recycling and cellulosic

nanomaterials in solid form.

ISO 287 [2] is used for the purpose of determining the average moisture content and the variation in

moisture content (maximum and minimum values) of a lot of paper and board. In the converting of

paper and board, moisture content is important as it can have an effect on processes such as printing

and copying. Moisture content can have an effect on curl and dimensional stability.

ISO 4119 [3] is used in laboratory procedures or is referred to in other International Standards in which

the stock concentration of an aqueous pulp suspension requires determination.
© ISO 2020 – All rights reserved v
---------------------- Page: 7 ----------------------
oSIST prEN ISO 638-2:2020
---------------------- Page: 8 ----------------------
oSIST prEN ISO 638-2:2020
DRAFT INTERNATIONAL STANDARD ISO/DIS 638-2:2020(E)
Paper, board, pulps and cellulosic nanomaterials —
Determination of dry matter content by oven-drying
method —
Part 2:
Suspensions of cellulosic nanomaterials
1 Scope

This document specifies an oven-drying method for the determination of the dry matter content

in suspensions of cellulosic nanomaterials. The procedure is applicable to cellulosic nanomaterial

suspensions which do not contain any appreciable quantities of materials other than water that are

volatile at the temperature of 105 °C ± 2 °C. It is used, for example, in the case of cellulosic nanomaterial

suspensions samples taken for chemical and physical tests in the laboratory, when a concurrent

determination of dry matter content is required.

NOTE 1 ISO 638-1 [1] specifies the total dry matter content of paper, board, paper and board for recycling

and cellulosic nanomaterials in solid form; ISO 287 [2] specifies the determination of moisture content of a lot of

paper and board; ISO 4119 [3] specifies the determination of stock concentration of aqueous pulp suspensions;

ISO 801 (all parts) [4] specifies the determination of saleable mass in lots.

NOTE 2 This document determines the total dry matter content of the sample, including any dissolved solids.

If only the cellulosic material content free of dissolved solids is desired, dissolved solids should be removed prior

to measuring the dry matter content e.g. by washing or dialysis, taking care to retain all cellulosic material.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO/TS 20477:2017, Nanotechnologies — Standard terms and their definition for cellulose nanomaterial

ISO/TS 80004-1:2015, Nanotechnologies — Vocabulary — Part 1: Core terms

ISO/TS 80004-6:2013, Nanotechnologies — Vocabulary — Part 6: Nano-object characterization

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
© ISO 2020 – All rights reserved 1
---------------------- Page: 9 ----------------------
oSIST prEN ISO 638-2:2020
ISO/DIS 638-2:2020(E)
3.1
cellulosic nanomaterial
CNM

material composed predominantly of cellulose, with any external dimension in the nanoscale (3.5), or a

material having internal structure or surface structure in the nanoscale, with the internal structure or

surface structure composed predominantly of cellulose

Note 1 to entry: The terms nanocellulose (NC) and cellulose nanomaterial (CNM) are alternative terms for

cellulosic nanomaterial (CNM).

Note 2 to entry: Some cellulosic nanomaterials can be composed of chemically modified cellulose.

[SOURCE: ISO/TS 20477:2017, 3.3.1, modified]
3.2
constant mass

mass reached by a container after drying until the difference between two successive dryings and

weighings does not exceed a specified mass fraction of the test specimen after drying

3.3
constant mass

mass reached by a test specimen after drying until the difference between two successive dryings and

weighings, separated in time by at least half the initial drying period, does not exceed a specified mass

fraction of the test specimen after drying
3.4
dry matter content

ratio of the mass of a test specimen, after drying to constant mass at a temperature of 105 °C ± 2 °C

under specified conditions, to its mass before drying

Note 1 to entry: The dry matter content is usually expressed as a percentage mass fraction.

3.5
nanoscale
length range approximately from 1 nm to 100 nm
Note 1
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.