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- Tóth, I., et al.
(author)
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Application of a sulphide-selective electrode in the absence of a pH-buffer
- 1988
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In: Talanta. - : Elsevier BV. - 0039-9140 .- 1873-3573. ; 35:10, s. 783-788
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Journal article (peer-reviewed)abstract
- Calibration of a sulphide electrode in the pH-range 9-12 has been studied as an e.m.f. vs. (pH - p[HS-]) function by measuring e.m.f. and pH in parallel. Calibration can also be done in this pH range by using a differential amplifier with a three-electrode measuring cell (glass, sulphide-selective and reference electrodes). The effects of an antioxidant (ascorbic acid) and a complexing agent (DCTA) on the calibration of the glass-sulphide electrode cell at pH < 5 were studied. The applicability of this end-point indicator cell has been demonstrated for titrations of Ag+, Pb2+ and Bi3+ with Na2S.
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