On-line measurement of pulp water anions by capillary electrophoresis with fast sequential sampling and dynamic solvent feeding

Heli Siren, Stella Rovio, Teemu Työppönen, Pertti Vastamäki

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

This paper demonstrates the use of the first on-line capillary electrophoresis instrument with continuously flowing electrolyte solutions and sequentially applied sample introduction. The system was used in on-line determination of chloride, sulphate and carbonate concentrations of process waters at a pulp mill. The module constructed for on-line feedings of the solvents is described. Separations were performed in a pyromellitic acid-hexamethonium hydroxide-triethanol amine mixture at pH 7.7 with indirect-UV detection at 254 nm. Two standard mixtures were used to show the repeatability of the analysis and to estimate the accuracy of the on-line system. The analytes could be separated within 240 s. Sampling from a pulp machine could be accomplished on-line at 6 minute intervals. On-line tests gave a limit of detection and a limit of determination in the low mg/L range.
Original languageEnglish
Pages (from-to)1136 - 1142
JournalJournal of Separation Science
Volume25
Issue number15-17
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

Fingerprint

Capillary electrophoresis
Pulp
Anions
Negative ions
Sampling
Hexamethonium
Online systems
Water
Carbonates
Paper and pulp mills
Electrolytes
Sulfates
Amines
Chlorides
Acids
hydroxide ion
pyromellitic acid

Keywords

  • on-line capillary electrophoresis
  • pulp waters
  • anions
  • continuous BGE flows

Cite this

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abstract = "This paper demonstrates the use of the first on-line capillary electrophoresis instrument with continuously flowing electrolyte solutions and sequentially applied sample introduction. The system was used in on-line determination of chloride, sulphate and carbonate concentrations of process waters at a pulp mill. The module constructed for on-line feedings of the solvents is described. Separations were performed in a pyromellitic acid-hexamethonium hydroxide-triethanol amine mixture at pH 7.7 with indirect-UV detection at 254 nm. Two standard mixtures were used to show the repeatability of the analysis and to estimate the accuracy of the on-line system. The analytes could be separated within 240 s. Sampling from a pulp machine could be accomplished on-line at 6 minute intervals. On-line tests gave a limit of detection and a limit of determination in the low mg/L range.",
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On-line measurement of pulp water anions by capillary electrophoresis with fast sequential sampling and dynamic solvent feeding. / Siren, Heli; Rovio, Stella; Työppönen, Teemu; Vastamäki, Pertti.

In: Journal of Separation Science, Vol. 25, No. 15-17, 2002, p. 1136 - 1142.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - On-line measurement of pulp water anions by capillary electrophoresis with fast sequential sampling and dynamic solvent feeding

AU - Siren, Heli

AU - Rovio, Stella

AU - Työppönen, Teemu

AU - Vastamäki, Pertti

PY - 2002

Y1 - 2002

N2 - This paper demonstrates the use of the first on-line capillary electrophoresis instrument with continuously flowing electrolyte solutions and sequentially applied sample introduction. The system was used in on-line determination of chloride, sulphate and carbonate concentrations of process waters at a pulp mill. The module constructed for on-line feedings of the solvents is described. Separations were performed in a pyromellitic acid-hexamethonium hydroxide-triethanol amine mixture at pH 7.7 with indirect-UV detection at 254 nm. Two standard mixtures were used to show the repeatability of the analysis and to estimate the accuracy of the on-line system. The analytes could be separated within 240 s. Sampling from a pulp machine could be accomplished on-line at 6 minute intervals. On-line tests gave a limit of detection and a limit of determination in the low mg/L range.

AB - This paper demonstrates the use of the first on-line capillary electrophoresis instrument with continuously flowing electrolyte solutions and sequentially applied sample introduction. The system was used in on-line determination of chloride, sulphate and carbonate concentrations of process waters at a pulp mill. The module constructed for on-line feedings of the solvents is described. Separations were performed in a pyromellitic acid-hexamethonium hydroxide-triethanol amine mixture at pH 7.7 with indirect-UV detection at 254 nm. Two standard mixtures were used to show the repeatability of the analysis and to estimate the accuracy of the on-line system. The analytes could be separated within 240 s. Sampling from a pulp machine could be accomplished on-line at 6 minute intervals. On-line tests gave a limit of detection and a limit of determination in the low mg/L range.

KW - on-line capillary electrophoresis

KW - pulp waters

KW - anions

KW - continuous BGE flows

U2 - 10.1002/1615-9314(20021101)25:15/17<1136::AID-JSSC1136>3.0.CO;2-K

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JO - Journal of Separation Science

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SN - 1615-9306

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