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BS ISO 302:2015

Pulps. Determination of Kappa number

standard by British Standard / International Organization for Standardization , 07/31/2015

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Full Description

BS ISO 302:2015 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.


Cross References:
ISO 638
ISO 7213
ISO 3260
ISO/TR 24498


All current amendments available at time of purchase are included with the purchase of this document.
 

Product Details

Published:
07/31/2015
ISBN(s):
9780580868924
Number of Pages:
22
File Size:
1 file , 1 MB
Same As:
ISO 302:2015
Product Code(s):
30302568, 30302568, 30302568
Note:
This product is unavailable in Russia, Ukraine, Belarus
 

Document History

  1. BS ISO 302:2015

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    Pulps. Determination of Kappa number

    • Most Recent

  2. BS 09/30195759 DC


    BS ISO 11704. Water quality. Measurement of gross alpha and beta activity concentration in non-saline water. Liquid scintillation counting method

    • Historical Version

  3. BS ISO 302:2004


    Pulps. Determination of Kappa number

    • Historical Version

  4. BS 03/306735 DC


    ISO 302. Pulps. Determination of Kappa number

    • Historical Version

  5. BS 4498:1982


    Method for determination of the Kappa number of pulp (degree of delignification)

    • Historical Version