Standard Swedish standard · SS-ISO 302:2012

Pulps - Determination of Kappa number (ISO 302:2004, IDT)

Status: Withdrawn

· Replaced by: SS-ISO 302:2016
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Standard Swedish standard · SS-ISO 302:2012

Pulps - Determination of Kappa number (ISO 302:2004, IDT)
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Scope
This International Standard specifies a method for the determination of the Kappa number of pulp. The Kappa number is an indication of the lignin content or bleachability of pulp. This International Standard is applicable to all kinds of chemical pulps and semi-chemical pulps within the Kappa number range 1 to 100. For pulps with a Kappa number exceeding 100, use the chlorine-consumption procedure (ISO 3260) to describe the degree of delignification.To achieve the greatest precision and accuracy, the sample size should be adjusted so that the consumption of permanganate falls between 20 % and 60 % of the amount added. NOTE There is no general and unambiguous relationship between the Kappa number and the lignin content of pulp. The relationship varies according to the wood species and delignification procedure. All compounds oxidized by KMnO4, not only lignin, will increase the consumption of KMnO4, and thereby increase the Kappa number (see [7]). If the Kappa number is to be used to derive an index of pulp lignin content, specific relationships will have to be developed for each pulp type.

Subjects

Pulps (85.040)


Buy this standard

Standard Swedish standard · SS-ISO 302:2012

Pulps - Determination of Kappa number (ISO 302:2004, IDT)
Subscribe on standards - Read more Dölj
Price: 735 SEK
standard ikon pdf

PDF

Price: 735 SEK
standard ikon

Paper

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Product information

Language: English

Written by: Svenska institutet för standarder

International title:

Article no: STD-85956

Edition: 1

Approved: 4/2/2012

No of pages: 24

Replaced by: SS-ISO 302:2016