ISO 9795:2023

Lignins — Determination of inorganics content in kraft lignin, soda lignin and hydrolysis lignin

This method describes procedures for the determination of inorganics content in kraft, soda, and hydrolysis lignin. The method is applicable to lignin isolated from a kraft pulping process, a soda pulping process, or lignin obtained by hydrolysis of biomass. For kraft lignin in the acid form, soda lignin, and hydrolysis lignin, the inorganics content is determined from the ash content of the sample. For kraft lignin in the base form, the inorganics content is determined from the sum of the contents of calcium, magnesium, manganese, iron, copper, sodium and potassium.

Lignines — Détermination de la teneur en matières inorganiques dans la lignine kraft, la lignine soude et la lignine d'hydrolyse

Cette méthode décrit les modes opératoires à suivre pour la détermination de la teneur en matières inorganiques dans la lignine kraft, la lignine soude et la lignine d’hydrolyse. La méthode est applicable à la lignine isolée par un procédé de trituration kraft, un procédé de trituration à la soude, ou à la lignine obtenue par hydrolyse de la biomasse. Pour la lignine kraft sous forme acide, la lignine soude et la lignine d’hydrolyse, la teneur en matières inorganiques est déterminée à partir de la teneur en cendres de l’échantillon. Pour la lignine kraft sous forme basique, la teneur en matières inorganiques est déterminée à partir de la somme des teneurs en calcium, magnésium, manganèse, fer, cuivre, sodium et potassium.

General Information

• Status: Published
• Publication Date: 17-Dec-2023
• ICS: 85.040 - Pulps
• Technical Committee: ISO/TC 6 - Paper, board and pulps
• Drafting Committee: ISO/TC 6 - Paper, board and pulps
• Current Stage: 6060 - International Standard published
• Start Date: 18-Dec-2023
• Due Date: 08-Nov-2024
• Completion Date: 18-Dec-2023

Standards Content (Sample)

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 9795
ISO/TC 6
Lignins — Determination of inorganics
Secretariat: SCC
content in kraft lignin, soda lignin and
Voting begins on:
2023-09-20 hydrolysis lignin
Voting terminates on:
Lignines — Détermination de la teneur en matières inorganiques
2023-11-15
dans la lignine kraft, la lignine soude et la lignine d'hydrolyse
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 9795:2023(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 2023

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ISO/FDIS 9795:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 9795
ISO/TC 6
Lignins — Determination of inorganics
Secretariat: SCC
content in kraft lignin, soda lignin and
Voting begins on:
hydrolysis lignin
Voting terminates on:
Lignines — Détermination de la teneur en matières inorganiques
dans la lignine kraft, la lignine soude et la lignine d'hydrolyse
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 9795:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

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ISO/FDIS 9795:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents . 2
6 Apparatus . 3
7 Sampling . 4
8 Procedure .4
8.1 Overview .
...

ISO/FDIS 9795:2023(E)
Style Definition: Heading 1: Indent: Left: 0 pt, First
line: 0 pt, Tab stops: Not at 21.6 pt
ISO TC6 WG 16TC 6
Style Definition: Heading 2: Font: Bold, Tab stops: Not
Secretariat: SCC
at 18 pt
Date: 2023-07-24xx
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Lignins — Determination of inorganics content in kraft lignin, soda lignin and hydrolysis lignin
Style Definition: Heading 4: Font: Bold
Lignines — Détermination de la teneur en matières inorganiques dans la lignine kraft, la lignine soude et Style Definition: Heading 5: Font: Bold
la lignine d'hydrolyse
Style Definition: Heading 6: Font: Bold
Style Definition: ANNEX
Style Definition: TOC 2
Style Definition: TOC Heading
Style Definition: AMEND Terms Heading: Font: Bold
Style Definition: AMEND Heading 1 Unnumbered:
Font: Bold

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ISO/FDIS 9795:2023(E)
© ISO 2023
Formatted: Pattern: Clear
Formatted: Pattern: Clear
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: [phone]
Email: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 9795:2023(E)
Contents
Foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 6
5 Reagents . 6
6 Apparatus . 7
7 Sampling . 8
8 Procedure . ….8
8.1 General . …………………………………………………………………………………………………………………….8
8.2 Measurement of dry matter content…………………………………………………………………………….8
8.3 Incineration……………………………………………………………………………………………………………………8
9 Determination of inorganics content………………………………………………………………………………9
9.1 Dissolution of the residue………………………………………………………………………………………….….9
9.2 Preparation of calibration solutions………………………………………………………………………… 9
9.3 Blank solution…………………………………………………………………………………………………………… 9
9.4 Determination………………………………………………………………………………………………………….9
10 Expression of results……………….…………………………………………………………………………….10
10.1 Inorganics content of kraft lignin (acid form), soda lignin, and hydrolysis lignin…….10
10.2 Inorganics content of kraft lignin in the base form…………………………………………………11
11 Precision…………………………………………………………………………………………………………………….11
12 Test report………………………………………………………………………………………………………………….11
Annex A………………………….……………………………………………………………………………………………….12
Bibliography…………………………………………………………………………………………………………………….13
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and defini
...