Comparative analysis between several methods of quantification of eucalyptus wood hemicelluloses

Química Nova

Carvalho, Ana Márcia Macedo Ladeira¹  Magaton, Andréia S.¹  Palmeiras, Lívia P. S.¹  Colodette, Jorge L.¹  Universidade Federal do Recôncavo da Bahia, Cruz das Almas, Brasil¹  Universidade Federal de Viçosa, Viçosa, Brasil¹  Universidade de São Paulo, Piracicaba, Brasil¹ 

关键词: xylan;    pentosan;    solubility.;   

DOI  :  10.1590/S0100-40422010000700025

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown