Updated: 2013-04-22

The main focus of research is to improve quality and functionality of fibre, paper and novel materials, based on detailed knowledge about morphological and chemical fibre characteristics. In this respect we have developed and established a series of techniques for chemical characterisation.

Contact: Ingebjørg Leirset.

Selected Methods

Water:
Extractive content:
Gravimetric determination. PFI-method-05-P-15
Quantitative analysis, group separation. PFI-method-05-P-13
Quantitative analysis , single components. PFI-method-05-P-16
Carbohydrates:
Total carbohydrates, the phenol-sulphuric acid  method. PFI-method-05-P-11
Hemicelluloses  and uronic acid, methanolysis. PFI-method-05-P-12
Quantitative composition, cellulose and hemicellulose. PFI-method-05-P-17
Reducing sugars, Nelsons method. PFI-method-05-P-18
Lignin:
Compounds in the water phase after MTBE-extraction. PFI-method-05-P-19
Other water analyses:
COD Dr.Lange: Determination of chemical oxygen demand. PFI-method-05-P-20
Particle size. PFI-method-05-P-21
Colour. NS 4787
Suspended matter and residue on ignition. NS 4733
Dry content and residue on ignition. NS 4764
pH. NS 4720
Conductivity. NS 4721
Pulp and paper:
Extractive content:
Gravimetric determination – Acetone. SCAN-CM 49:03
Gravimetric determination – Lipophilic matter. SCAN-CM 67:03
Quantitative analysis, group separation. PFI-method-05-P-13
Quantitative analysis , single components. PFI-method-05-P-22
Carbohydrates:
Hemicelluloses  and uronic acid, methanolysis. PFI-method-05-P-12
Quantitative composition, cellulose and hemicellulose. PFI-method-05-P-23
Lignin:
Acid insoluble (Klason) and acid soluble lignin. PFI-method-05-P-24
Charge:
Total charge. PFI-method-05-P-25
Total charge – Total acidic group content. SCAN CM 65:02
Surface charge. PFI-method-05-P-26
Other analysis:
Sulfonic acid. PFI-method-05-P-27
Volatile compounds: (based on “purge & trap”-GC/MS). PFI-method
Dry residue, HR73 Moisture Analyzer (balance). PFI-method-05-P-A-02
Ash, 525°C. ISO 1762
Deposits:  Quantitative analysis – py-GC/MS and FT-IR.
MFC-films: OTR, oxygen transmission rate. PFI-method-05-P-28