Potentiometric determination of thiourea with a sulphide-selective membrane electrode

M. K. Pápay, K. Tóth, E. Pungor

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The determination of thiourea by direct potentiometric measurement and by potentiometric titration with silver nitrate, by means of a sulphide-selective electrode is described. The lower limit of determination in direct potentiometry is 10-6 M thiourea. Titrations can be successfully performed down to 10-3 M concentration. Two jumps appear on the titration curve, the first corresponding to the formation of silver sulphide and the second to the precipitation of silver cyanamide. Elemental and infrared analysis of the products of titration confirm the formation of silver sulphide and silver cyanamide.

Original languageEnglish
Pages (from-to)291-296
Number of pages6
JournalAnalytica Chimica Acta
Volume56
Issue number2
DOIs
Publication statusPublished - 1971

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Cyanamide
Thiourea
Sulfides
Titration
Silver
silver
Electrodes
electrode
sulfide
Potentiometry
membrane
Membranes
Silver Nitrate
Infrared radiation
silver sulfide
nitrate

ASJC Scopus subject areas

  • Biochemistry
  • Analytical Chemistry
  • Spectroscopy
  • Environmental Chemistry

Cite this

Potentiometric determination of thiourea with a sulphide-selective membrane electrode. / Pápay, M. K.; Tóth, K.; Pungor, E.

In: Analytica Chimica Acta, Vol. 56, No. 2, 1971, p. 291-296.

Research output: Contribution to journalArticle

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