Abstract
Determination of soluble ion concentrations directly in
the pulp suspension by separation techniques is needed to
control the quality of the final product. The increasing
demands for rapid monitoring of samples on-line require
either the development of new instruments or the
modification of existing commercial instruments. In
addition, the analytical methods suitable for rapid
on-line analyses must be developed and optimized.
Capillary electrophoresis (CE) has demonstrated its
potential to become a significant technique for a variety
of analyses due to especially its high speed and ease of
aytomation. Good results have already been obtained in
coupling of the instrument to paper machines. As far we
know, no commercial CE instruments exist for totally
on-line measurements, though some manufacturers have
produced gradient solvent modules compatible with flow
cells for change of the samples.
In this study, we have developed and tested a short
capillary electrophoresis instrument which is suitable
for on-line control of industrial processes. The
instrument consists of a three partial cell unit, the
centre part for the capillary and UV detection. The
on-line unit has fixed tunnels for dynamic replenishment
of electrolyte solution at its both ends. Due to the
on-line solvent delivery system constructed into the CE
front and rear positions of the cell unit, the capillary
and the platinum electrodes will be kept uncontamined.
Samples are introduced into the capillary
electrokinetically. Determination of chloride, sulphate,
oxalate, formiate and acetate from pulp waters are shown.
| Original language | English |
|---|---|
| Title of host publication | ITP 2002, 13th International Symposium on Capillary Electroseparation Techniques |
| Subtitle of host publication | program and book of abstracts |
| Place of Publication | Helsinki |
| Publisher | University of Helsinki |
| Publication status | Published - 2002 |
| MoE publication type | B3 Non-refereed article in conference proceedings |
| Event | 13th International Symposium on Capillary Electroseparation Techniques - Helsinki, Finland Duration: 1 Sept 2002 → 4 Sept 2002 |
Conference
| Conference | 13th International Symposium on Capillary Electroseparation Techniques |
|---|---|
| Country/Territory | Finland |
| City | Helsinki |
| Period | 1/09/02 → 4/09/02 |
Keywords
- on-line capillary electrophoresis
- pulp waters
- anions