Determination of elemental sulphur, sulphide and their mixtures in electrolyte solutions by a.c. voltammetry
✍ Scribed by Nikola Batina; Irena Ciglenečki; Božena Ćosović
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 684 KB
- Volume
- 267
- Category
- Article
- ISSN
- 0003-2670
No coin nor oath required. For personal study only.
✦ Synopsis
The electrochemical behavlour of elemental sulphur, sulphlde and their mixtures on a mercury electrode m 0 5 mol dme3 NaCl-NaOH supporting electrolyte at pH 10 with and without the addltlon of 10% (v/v) methanol and 1 x lo-' mol dme3 toluene was studled Investigations were carried out over a wide concentration range (from 1 x lo-' to 1 x 10e3 mol dms3) of sulphur species in solution by a c voltammetry Differences in the electrochemlcal behavlour dunng the formation of HgS at the electrode surface were observed between the two Investigated species under different experimental condltlons such as accumulation at different potential and voltammetrlc scan dIrectIons Based on these differences, a method for the determmatlon of sulphlde, elemental sulphur and their mixtures m the aqueous solution IS proposed The solubdity of elemental sulphur In aqueous medium at room temperature was determined as 17 X 10e6 mol dme3 The usefulness of the proposed method for the direct determination of sulphtde and elemental sulphur m natural waters IS discussed