Properties and components of water extracts pH and conductivity of water extracts of pulp pH measurement indicates the presence of acidic or basic ions in pulp. Conductivity measurement indicates the level of residual ionic impurities. A sample is extracted with water under specific conditions (standard concentration, temperature and time). The pH and conductivity is then
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Properties and components of water extracts
After reading this article you will..
- know that pH indicates the presence of acidic or basic ions in pulp and that the conductivity measurement indicates the level of residual ionic impurities.
- know that water soluble sulphates and chlorides are determined from water extract with chromatographic or titrimetric methods.
Content
Material testing and product properties
- Why test pulp and paper?
- Fibre properties
- Papermaking properties of pulp
- Fluff pulps
- Chemical analysis of pulps
- General physical properties of paper and board
- Optical properties of paper
- End-use properties of printing papers
- End-use properties of packaging papers and boards
- Tissue papers
- Permanent papers
- Reliability of results in physical testing of pulp and paper
- Quality control at the mill
- Standardisation in pulp and paper testing
Authors & references
Edited by:
Petteri Maijanen, ABB
Original authors:
Tiina Hausalo, Liva Söderhjelm
Based on: Hausalo, T., Söderhjelm, L., Chemical analysis of pulps (Chapter 6). In: Levlin, J-E. & Sjöderhelm, L. (ed), Pulp and paper testing (Book 17), Papermaking Science and Technology. Jyväskylä. 1999. Fapet Oy. pp. 111–135.
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This page has been updated 30.03.2021
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