|
authors |
Evtuguin, DV; Daniel, AID; Neto, CP |
|
nationality |
International |
|
journal |
JOURNAL OF PULP AND PAPER SCIENCE |
|
author keywords |
kraft pulps; uronic acids; lignins; ultraviolet spectroscopy; cadoxene |
|
keywords |
PINE KRAFT PULP; NMR-SPECTROSCOPY; XYLAN; HYDROLYSIS; WOOD; ECF |
|
abstract |
A new method for the simultaneous determination of hexenuronic acid (HexA) and residual lignin in kraft pulps by UV spectroscopy in cadoxen solutions is proposed. Unbleached or partially bleached hardwood or softwood pulps soluble in cadoxen can be analyzed. The HexA content determined by this new method is about 5% higher that obtained by the conventional acid hydrolysis technique. The residual lignin concentrations in the pulps afforded by this approach are lower than those determined without taking into account the presence of HexA. The advantages and limitations of the method are discussed. |
|
publisher |
PULP & PAPER TECHNICAL ASSOCIATION CANADA |
|
issn |
0826-6220 |
|
year published |
2002 |
|
volume |
28 |
|
issue |
6 |
|
beginning page |
189 |
|
ending page |
192 |
|
web of science category |
Materials Science, Paper & Wood |
|
subject category |
Materials Science |
|
unique article identifier |
WOS:000176672400002
|
