Determination of soluble anions and cations from waters of pulp and paper mills with on-line coupled capillary electrophoresis

Heli Siren (Corresponding Author), Raimo Kokkonen, Tarja Hiissa, Timo Särme, Olli Rimpinen, Risto Laitinen

Research output: Contribution to journalArticleScientificpeer-review

28 Citations (Scopus)

Abstract

When the degree of closure of the paper machine wet end waters increases, wet end problems also become more difficult to control without specific and selective on-line measurements. The need to measure the concentrations of individual compounds in order to explain wet end phenomena is growing. This study was performed to set up a CE system to a paper machine and to determine soluble inorganic and organic ions in different locations of pulp and paper process waters with real time analyses by two on-line CE methods. A reconstructed commercial CE apparatus was connected to a papermaking machine via an apparatus, which was a combined sampling and sample pretreatment instrument, the role of which was to filter and dilute the samples before on-line determination by CE. The on-line procedures were optimized for simultaneous determination of anions as chloride, sulfate, oxalate, formate and acetate and for determination of cations as potassium, calcium, sodium, magnesium and traces of aluminium. The quantification was performed with external standard methods using the programs available in the commercial CE instrument. The concentrations of the ions were transferred by using a computerized transfer algorithm exporting the results from the analysis instrument to the process control unit. The developed on-line procedures were tested three times in paper and paperboard mills for 1 month at a time. Correlations were observed between the CE results and changes in the processes.

Original languageEnglish
Pages (from-to)189 - 196
Number of pages8
JournalJournal of Chromatography A
Volume895
Issue number1-2
DOIs
Publication statusPublished - 2000
MoE publication typeA1 Journal article-refereed

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Capillary electrophoresis
Paper and pulp mills
Capillary Electrophoresis
Anions
Cations
formic acid
Water
Ions
Paperboards
Oxalates
Papermaking
Aluminum
Magnesium
Sulfates
Pulp
Process control
Chlorides
Potassium
Acetates
Sodium

Cite this

Siren, Heli ; Kokkonen, Raimo ; Hiissa, Tarja ; Särme, Timo ; Rimpinen, Olli ; Laitinen, Risto. / Determination of soluble anions and cations from waters of pulp and paper mills with on-line coupled capillary electrophoresis. In: Journal of Chromatography A. 2000 ; Vol. 895, No. 1-2. pp. 189 - 196.
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Determination of soluble anions and cations from waters of pulp and paper mills with on-line coupled capillary electrophoresis. / Siren, Heli (Corresponding Author); Kokkonen, Raimo; Hiissa, Tarja; Särme, Timo; Rimpinen, Olli; Laitinen, Risto.

In: Journal of Chromatography A, Vol. 895, No. 1-2, 2000, p. 189 - 196.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Siren, Heli

AU - Kokkonen, Raimo

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AU - Rimpinen, Olli

AU - Laitinen, Risto

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