Continuous flow determination of sulphate with a lead-selective electrode

Hirokazu Hara, G. Horvai, Erno Pungor

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A continuous flow system was constructed for the determination of sulphate in the concentration range 10-5-10-3 M. The reagent stream, containing lead(II) ion, ionic-strength adjuster and pH-adjustment buffer in methanol, was mixed with a sample sulphate stream and the free lead(II) concentration was monitored with a lead ion-selective electrode. The calibration graph is not linear owing to the titrimetric character of the determination and the curvature is explained by the solubility equilibrium that exists between lead and sulphate. The relative error was within ±10%. Interference from hydrogen carbonate was observed even in the presence of acidic buffer.

Original languageEnglish
Pages (from-to)1817-1820
Number of pages4
JournalThe Analyst
Volume113
DOIs
Publication statusPublished - 1988

Fingerprint

Sulfates
Buffers
Electrodes
electrode
Lead
sulfate
Ion-Selective Electrodes
Bicarbonates
Ionic strength
Osmolar Concentration
Solubility
Calibration
Methanol
ion
Ions
curvature
methanol
Carbonates
solubility
hydrogen

Keywords

  • Continuous flow analysis
  • Lead-selective electrode
  • Sulphate determination
  • Water analysis

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Continuous flow determination of sulphate with a lead-selective electrode. / Hara, Hirokazu; Horvai, G.; Pungor, Erno.

In: The Analyst, Vol. 113, 1988, p. 1817-1820.

Research output: Contribution to journalArticle

Hara, Hirokazu ; Horvai, G. ; Pungor, Erno. / Continuous flow determination of sulphate with a lead-selective electrode. In: The Analyst. 1988 ; Vol. 113. pp. 1817-1820.
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