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, cilt.39, sa.3, ss.639-647, 2015 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 39 Konu: 3
  • Basım Tarihi: 2015
  • Doi Numarası: 10.3906/kim-1412-19
  • Dergi Adı: TURKISH JOURNAL OF CHEMISTRY
  • Sayfa Sayıları: ss.639-647

Özet

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.