Determination of anions from process waters with on-line capillary electrophoresis instrument

Heli Siren, Teemu Työppönen, Stella Rovio, Pertti Vastamäki, Pekka Savolahti

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

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 de-livery 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 languageEnglish
Title of host publicationInternational Symposium on Microscale Separations and Analysis
Publication statusPublished - 2002
MoE publication typeA4 Article in a conference publication
Event15th International Symposium on Microscale Separations and Analysis: HPCE 2002 - Stockholm, Sweden
Duration: 13 Apr 200218 Apr 2002

Conference

Conference15th International Symposium on Microscale Separations and Analysis
CountrySweden
CityStockholm
Period13/04/0218/04/02

Fingerprint

Capillary electrophoresis
Anions
Water
Pulp
Oxalates
Platinum
Electrolytes
Sulfates
Chlorides
Suspensions
Tunnels
Acetates
Ions
Electrodes
Monitoring

Cite this

Siren, H., Työppönen, T., Rovio, S., Vastamäki, P., & Savolahti, P. (2002). Determination of anions from process waters with on-line capillary electrophoresis instrument. In International Symposium on Microscale Separations and Analysis [339]
Siren, Heli ; Työppönen, Teemu ; Rovio, Stella ; Vastamäki, Pertti ; Savolahti, Pekka. / Determination of anions from process waters with on-line capillary electrophoresis instrument. International Symposium on Microscale Separations and Analysis. 2002.
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Siren, H, Työppönen, T, Rovio, S, Vastamäki, P & Savolahti, P 2002, Determination of anions from process waters with on-line capillary electrophoresis instrument. in International Symposium on Microscale Separations and Analysis., 339, 15th International Symposium on Microscale Separations and Analysis, Stockholm, Sweden, 13/04/02.

Determination of anions from process waters with on-line capillary electrophoresis instrument. / Siren, Heli; Työppönen, Teemu; Rovio, Stella; Vastamäki, Pertti; Savolahti, Pekka.

International Symposium on Microscale Separations and Analysis. 2002. 339.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Determination of anions from process waters with on-line capillary electrophoresis instrument

AU - Siren, Heli

AU - Työppönen, Teemu

AU - Rovio, Stella

AU - Vastamäki, Pertti

AU - Savolahti, Pekka

PY - 2002

Y1 - 2002

N2 - 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 de-livery 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.

AB - 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 de-livery 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.

M3 - Conference article in proceedings

BT - International Symposium on Microscale Separations and Analysis

ER -

Siren H, Työppönen T, Rovio S, Vastamäki P, Savolahti P. Determination of anions from process waters with on-line capillary electrophoresis instrument. In International Symposium on Microscale Separations and Analysis. 2002. 339