The composition of peat liquids: 1. Optimization of g.p.c. parameters for the analysis of peat liquids

✍ Scribed by Ola Karlsson

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 642 KB
• Volume: 69
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(90)90146-h

✦ Synopsis

This paper describes some possible methods for the characterization of peat-derived liquefaction products.

The molecular weight distribution was estimated for the THF soluble part of peat liquefaction products using gel permeation chromatography (g.p.c.) with model compounds and polystyrene standards. Ultraviolet, refractive index, evaporative light scattering and infrared detection were used. The advantages and drawbacks of these techniques are discussed. Simulated distillations were attempted and the results are compared with micro distillations at reduced pressure. Molecular weight averages and simulated distillations could not be obtained using g.p.c. with any of these detectors, without introducing molecular weight dependent response factors. However, similar types of oils can be compared directly if the problem with sample ageing is eliminated.