Tetrathiocyanozincate- and tetrathiocyanocobaltate-selective electrodes with low detection limits

  • Yulya V. Matveichuk Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk
  • Evgenii M. Rakhman’ko Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk
  • Yauhen B. Akayeu Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk
  • Vyacheslav V. Zhilko Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk

Abstract

It was found that tetrathiocyanozincate- and tetrathiocyanocobaltate-selective electrodes based on steric hindered quaternary ammonium salt – 3,4,5 trisdodecyloxybenzyltrioctadecylammonium bromide (5 wt. %), dibutylphthalate – plasticizer (62 wt. %) with an internal solution containing 1 ⋅ 10– 4 mol/L of Zn2+ and 1 ⋅ 10–2 mol/L KCNS for tetrathiocyanozincate-selective electrodes or 1 ⋅ 10– 4 mol/LCo2+ and 0.1 mol/L for tetrathiocyanocobaltate-selective electrodes allow to determine of zinc or cobalt on the level 2 ⋅ 10–7 mol/L. It also eliminates the use of a volatile and carcinogenic membrane plasticizers and becomes to possible of measure the potential of the electrode system in the solutions at any concentration sequence. It is shown that the «washing» of electrodes before measurement with distilled water is undesirable because it leads to overestimation of the low detection limit.

Author Biographies

Yulya V. Matveichuk, Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk

PhD (chemistry), docent; associate professor at the department of analytical chemistry, faculty of chemistry

Evgenii M. Rakhman’ko, Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk

doctor of science (chemistry), full professor; head of the department of analytical chemistry, faculty of chemistry

Yauhen B. Akayeu, Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk

PhD (chemistry), docent; associate professor at the department of analytical chemistry, leading researcher at the laboratory of chemical analytical systems at the department of analytical chemistry, faculty of chemistry

Vyacheslav V. Zhilko, Belarusian State University, Nezavisimosti avenue, 4, 220030, Minsk

PhD (chemistry); associate professor at the department of analytical chemistry, faculty of chemistry

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Published
2017-12-01
Keywords: tetrathiocyanozincate- and tetrathiocyanocobaltate-selective electrodes, quaternary ammonium salt, plasticizer
How to Cite
Matveichuk, Y. V., Rakhman’ko, E. M., Akayeu, Y. B., & Zhilko, V. V. (2017). Tetrathiocyanozincate- and tetrathiocyanocobaltate-selective electrodes with low detection limits. Journal of the Belarusian State University. Chemistry, 2, 78-84. Retrieved from https://journals.bsu.by/index.php/chemistry/article/view/1170
Issue
No 2 (2017): Journal of the Belarusian State University. Chemistry
Section
Original Articles

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