Análise comparativa entre vários métodos de quantificação de hemiceluloses da madeira de eucalipto

Química Nova

Lívia P. S. Palmeiras²  Andréia S. Magaton¹  Jorge L. Colodette¹  Ana Márcia Macedo Ladeira Carvalho¹ 

[1] ,Universidade de São Paulo Escola Superior de Agricultura Luiz de Queiroz Piracicaba SP ,Brasil

关键词: xylan;    pentosan;    solubility;   

DOI  :  10.1590/S0100-40422010000700025

来源: SciELO

【 摘 要 】

Pulp hemicelluloses can be extracted with NaOH and quantified by colorimetric and gravimetric techniques. However the most usual methods to measure eucalyptus pulp hemicelluloses have been through the pentosan method or through xylan analyses by GC or HPLC techniques. In this study a comparison was made between the more traditional methods and indirect method of NaOH 5% extraction followed by colorimetric analyses. It was observed that the content of NaOH 5% extract correlates very well with pulp xylan content and reasonably well with the pentosan content. It is concluded that the 5% NaOH solubility method can be used in replacement of the other two, since it is faster, simpler and less costly to carry out than the others.

【 授权许可】

CC BY-NC   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License