Determination of Lignin Degradation Compounds in Different Wood Digestion Solutions by Capillary Electrophoresis
نویسندگان
چکیده
This work presents the investigation of various capillary electrophoretic techniques for the Separation of low-molecular-weight phenolic and neutral lignin degradation products. A successful CE mode was micellar electrlokinetic chromatography (MEKC) with carrier electrolytes containing micelleformi:ng reagents, such as sodium dodecylsulfate. Important phenolic and neutr;al lignin degradation compounds could be separated by MEKC after acidification of the liquors and extraction of the compounds with dichloromethane. The influence of electrolyte composition, pH, amount of organic solvent, temperature and voltage have been investigated to determine the best Separation conditions. In addition, microemulsion electrokinetic chromatography (MEEKC) was investigated as an alternative to MEKC. It is a CE technique in which analytes interact with moving oil droplets present in a microemulsion electrolyte System. Botlh MEKC and MEEKC allowed the investigation of different wood digestion procedures and differentes in lignin degradation products from different kinds of wood (eucalyptus, beech, Scotch pine and acacia).
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