Determination of the total dissolved sulphide in the pH range 3-11.4 with sulphide selective ISE and Ag/A92S electrodes

Erika Schmidt, Aurél Marton, J. Hlavay

Research output: Article

14 Citations (Scopus)

Abstract

An electrochemical method for the determination of the total sulphide concentration of sewage water samples has been studied using a potentiometric cell containing either a sulphide ion selective ISE-glass electrode pair or a Ag/Ag2S electrode-glass electrode system. The performance of the two sulphide ion sensors was investigated and compared in both acidic and basic pH ranges. It was proved that the cell potential can be made directly proportional to the logarithm of the total sulphide concentration when both the pH <lg K2 - 1.5 condition (acidic range) and also when the lg K2 + 1.5 <pH <lg K1 - 1.5 condition prevails in the system (alkaline range); where K1 and K2 are the first and second protonation constants of the sulphide ion, respectively. A suitable calibration method for a wide range of sulphide concentration is also presented for both ranges of the pH scale. The overall performance of the measuring system was tested using model solutions and real waste water samples.

Original languageEnglish
Pages (from-to)1219-1224
Number of pages6
JournalTalanta
Volume41
Issue number7
DOIs
Publication statusPublished - 1994

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Sulfides
Electrodes
Ions
Glass
Protonation
Sewage
Waste Water
Calibration
Wastewater
Water
Sensors

ASJC Scopus subject areas

  • Analytical Chemistry
  • Spectroscopy

Cite this

Determination of the total dissolved sulphide in the pH range 3-11.4 with sulphide selective ISE and Ag/A92S electrodes. / Schmidt, Erika; Marton, Aurél; Hlavay, J.

In: Talanta, Vol. 41, No. 7, 1994, p. 1219-1224.

Research output: Article

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