In most pulp lignin content measurements, only the average lignin content is measured and no information on the variance of the lignin content between fibres is obtained. This paper describes a new method, based on mid-infrared attenuated total reflectance spectroscopy and multivariate data analysis, to determine the variation of lignin content in pulp fibres. It was shown that laboratory-cooked and mill-cooked hardwood kraft pulps have a much higher uniformity than mill-cooked softwood pulp and the softwood kraft pulp became more uniform after oxygen delignification. The pulp lignin content variability was not found to correlate with pulp bleachability.
|Journal||Journal of Pulp and Paper Science|
|Publication status||Published - 2003|
|MoE publication type||A1 Journal article-refereed|
Jääskeläinen, A-S., Nuopponen, M., Axelsson, P., Tenhunen, M., Löija, M., & Vuorinen, T. (2003). Determination of lignin distribution in pulps by FTIR ATR spectroscopy. Journal of Pulp and Paper Science, 29(10), 328-331.