A new and simple procedure for the trace determination of mercury using differential pulse polarography and application to a salt lake sample


Somer G., Caliskan A. C. , ŞENDİL O.

TURKISH JOURNAL OF CHEMISTRY, vol.39, no.3, pp.639-647, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 39 Issue: 3
  • Publication Date: 2015
  • Doi Number: 10.3906/kim-1412-19
  • Journal Name: TURKISH JOURNAL OF CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.639-647
  • Keywords: Differential pulse polarography, mercury in raw salt, salt lake, trace determination, STRIPPING VOLTAMMETRIC DETERMINATION, ATOMIC-ABSORPTION-SPECTROMETRY, OPTICAL-EMISSION SPECTROMETRY, PLASMA, PRECONCENTRATION, ELECTRODES, WATERS, HG(II), SENSOR
  • Gazi University Affiliated: Yes

Abstract

A new and simple differential pulse polarographic procedure was established for the trace determination of mercury(II). An indirect method had to be used since no polarographic peak can be observed for its direct determination. According to their standard potentials, the reaction between SO32- and Hg(II) was suitable. The peak height of sulfite at about -0.70 V (pH 6, 7) was sharp, high, and very reproducible, enabling the accurate determination of low concentrations of Hg(II). It was found that sulfite concentration had to be 3 times larger than mercury at pH 6, in order to have a quantitative reaction.