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  • BSI
    BS ISO 302:2015 Pulps. Determination of Kappa number
    Edition: 2015
    $316.70
    / user per year

Description of BS ISO 302:2015 2015

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 chlorineconsumption procedure (ISO 3260) to describe the degree of delignification.

To achieve the greatest precision and accuracy, the sample size has to 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.[8] 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.



Standard NumberBS ISO 302:2015
TitlePulps. Determination of Kappa number
StatusConfirmed
Publication Date2015-07-31
ReplacesBS ISO 302:2004
Identical National Standard OfISO 302:2015
DescriptorsChemical analysis and testing, Degree of delignification, Kappa number, Specimen preparation, Paper pulp, Bleaching tests
ICS85.040 Pulps
CommitteePAI/11
ISBN978 0 580 86892 4
PublisherBSI
Pages22

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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