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Journal of Wood Science

Official Journal of the Japan Wood Research Society

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Residual extractives in aspen kraft pulps and their impact on kappa number and Klason lignin determination

Journal of Wood Science volume 53, pages 494–497 (2007)Cite this article

Abstract

We investigated the impact of residual extractives on lignin determination by lignin content difference between unextracted and extracted pulps, residual extractives analysis, and lignin content contribution from model extractive compounds. There were two different kinds of extractives in aspen kraft pulp. The extractives impacting on kappa number determination were well removed in oxygen delignification; these were mainly unsaturated fatty acids. However, the extractives impacting on Klason lignin determination were largely resistant to oxygen delignification; these were mainly saturated fatty acids, sterols, and hydrocarbons. Oxidation of unsaturated fatty acids was the main reaction in oxygen delignification. These trends were confirmed by simulation of lignin content determination with three model extractive compounds (β-sitosterol, linoleic acid, and palmitic acid).

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Author notes

  1. Soo-Jeong Shin

    Present address: Wood and Paper Science, School of Forest Resources and Rural Engineering, Chungbuk National University, Chungbuk, 361-763, Korea

Authors and Affiliations

  1. Faculty of Paper Science and Engineering, State University of New York, College of Environmental Science and Forestry (SUNY-ESF), New York, 13210, USA

    Soo-Jeong Shin & Yuan-Zong Lai

  2. Wood and Paper Science, School of Forest Resources, and Rural Engineering, Chungbuk National University, Cheongju, Chungbuk, 361-763, Korea

    Nam-Seok Cho

Authors
  1. Soo-Jeong Shin
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  2. Nam-Seok Cho
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  3. Yuan-Zong Lai
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Corresponding author

Correspondence to Nam-Seok Cho.

Additional information

The publication of this article was made possible by an Emachu Research Fund. The authors are grateful for the fund.

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Shin, SJ., Cho, NS. & Lai, YZ. Residual extractives in aspen kraft pulps and their impact on kappa number and Klason lignin determination. J Wood Sci 53, 494–497 (2007). https://doi.org/10.1007/s10086-007-0894-8

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  • DOI: https://doi.org/10.1007/s10086-007-0894-8

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