| 摘要 |
<p>The invention relates to a method of determination of anionic groups in pulp fibres comprising at least the following steps: collecting a pulp sample from the process, washing the pulp sample with water, removing excess water from the pulp sample, adding a volume of a dye solution to the sample, thus forming a pulp suspension, letting the dye solution to react with the pulp fibres in the pulp suspension, separating at least a part of the dye solution from the fibres, determining the dye concentration in the separated solution and calculating the amount of anionic groups in pulp fibres. The invention is characterized in that the dye solution iThe invention relates to a method of determination of anionic groups in pulp fibres comprising at least the following steps: collecting a pulp sample from the process, washing the pulp sample with water, removing excess water from the pulp sample, adding a volume of a dye solution to the sample, thus forming a pulp suspension, letting the dye solution to react with the pulp fibres in the pulp suspension, separating at least a part of the dye solution from the fibres, determining the dye concentration in the separated solution and calculating the amount of anionic groups in pulp fibres. The invention is characterized in that the dye solution is reacted with the pulp fibres in the sample, by mixing said pulp solution for at least 3 minutes. The invention further relates to a device for use in said process.</p> |
