Hg(II) ion- Selective Electrodes with Neutral Carriers of Macrocycles

거대고리 중성 운반체를 갖는 Hg(II)이온 선택성 전극

  • 정오진 (조선대학교 자연과학대학 환경학과)
  • Published : 1996.04.01

Abstract

New thin-and diselena-crown ethers containing two suffer and selenium donor atoms have been prepared. And then, mercury ($Hg^{2+}$) ion-selective electrodes with PVC-plasticizer (STPB) based on some macrocycles as neutral carriers were also made. The electrochemical selectivities for various ions, and the effects for macrocycles, matrix of membranes, ratio of plasticizer to macrowcles, concentration and pH of test solution were investigated on the $Hg^{2+}$ ion-selective electrodes. The 1, 10-diselena-18-crown-6-PVC-STPB (sodium tetraphenylborate) exhibited good linear responses of ${28.2}\pm{0.6}$ decade-1 for $Hg^{2+}$ ion in the conientration ranges of $10^{-2}~10^{-6}$ M $Hg^{2+}$ ion. This electrode exhibited comparatively good selectivities for $Hg^{2+}$ ion in comparison with alkali and alkaline earth metal ions, some heavy metal ions and rare earth metal ion in the range of pH 2.5~6.0. In addition, this electrode was applied as a sensor in the titration of $Hg^{2+}$ ion with $1^-$ ion in water.

두 개의 황과 셀렌의 주개원자를 포함한 새로운 thia 및 diselena 크라운에데르 화합물을 합성하였다. 그리고 이 화합들을 중성운반체로 하고 PVC-가소제 (STPB)를 포함한 Hg(ll) 선택성 전극을 제작하였다. 이 전극들을 이용하여 여러 이온들의 전기화학적 선택성, 중성운반체의 종류 및 농도와 선택막의 매질에 대한 효과 그리고 실험용액의 pH변화에 대한 전극의 선택적 감응성들의 영향을 각각 검토하였다. 1,10-diselena-18-crown-6-PVC-STPB의 중성운반체의 막전극은 $10^{-2}$-10- M $Hg^{2+}$ 이온의 농도범위에서 ${28.2}\pm{0.6}$의 Nernstian 기울기를 갖는 좋은 선형적 감응성을 갖는다. 그리고 이 전극은 pH 2.5~6.0 범 위에서 알칼리토 금속, 몇가지 중금속 및 희토류 금속 이온에 대하여 좋은 선택성을 갖는다. 특히 이 전극은 수용액 중에서.$1^-$ 이온으로 Hg^{2-}$ 이온을 전위차 적정할 수 있는 센서로서 응용할 수 있다.

Keywords

References

  1. Analytical Method Guide(Fifth Edition) Orion Research
  2. J.InCI. Phem. v.7 Synthesis of two new crown ethers containing selenium and the complexation of one of them with silver and lead McDaniel,C.M.;J.S.Bradshaw;K.H.Tarbet;G.C.Lindh;R.M.Izatt
  3. Bull. Kor. Chem. Sor. v.14 no.5 Formation of Cadmium (Ⅱ) nitrate complexes with maerocycles Kim,H.D.;H.J.Jung;O.J.Jung
  4. Ph.D. Dissertation, Chosun University Studies of post-transition metal complexes with macrocycles in solutions Kim,H.D.;O.J.Jung(Advisor Prof.)
  5. J.Am. Chem. Soc. v.93 Stability constants of complexes with macrocyclic compoundes Frensdoff,H.K.
  6. J. Membrane Sci. v.9 Stability constants of carion-macrocyle complexes and their effect on facilitated membrane transportrate Lamb,H.D.;R.M.Izatt;D.G.Garrick;J.S.Bradshaw;J.J.Christensen
  7. Anal. Chem. v.44 Selectivity of cyclic polyethers type liquid membrane electrodes Rechnitz,G.A.;E.Eyal
  8. Analysist v.109 Jeng,J.;Shin,J.S.
  9. Anal. Chem. v.59 Lithium ion selective electrodes based on crown ethers for serum lithium assay Kimura,K.;H.Oishi;T.Mirua;T.Shono
  10. Analyst v.111 Mercury (Ⅱ) and Silver(Ⅰ) ion-selective eletroes based on dithiacrown ethers Lai,M.T.;J.S.Shin
  11. Chem. Lett. Neutral carrier-type silver ion-selective electrode based on lipophilic monothiacrown-ether Oue,M.;K.Kimura;K.Akama;M.Tanaka;T.Shone
  12. Anal. Chim. Acta v.73 Selectivity of neutral carrier-PVC membrane electrods Macini,M.;F.Pallozzi
  13. Orion Newsl. v.9a
  14. Bull, Kor, Chem. Soc. v.14 no.6 Interaction of the post-transition metal ions and new some macrocycles in solution Jung,O.J.
  15. J.Chem. Soc., Dalton Trans. Calulation of stability for metal complexs Peter Grans
  16. Chem. Lett. A PVC matrix membrane copper ion-selective electrode based on macrocyclic polythiaether Kamata,S.;M.Higo;T.Kmibeppu;I.Tanaka
  17. Bull. Chem. Soc. Jpn. v.54 Study of cationic surfactant ion selective polyvinylchloride membrane electrode containing dibenzo-18-crown-6 Maeda,T.;M.Ikeda;M.Shibahara;T.Haruta;I.Satake
  18. Anal. Chem. v.57 Barium ion selective electrode for use in acetonitrile Nakmura,T.;G.A.Rechnitz
  19. J.Indian Chem. Soco. v.59 Heterogeneous ion-selective electrodes based on electroneutral ion-carriers Lai,U.S.;M.C.Chattopadhyaya;A.K.Day
  20. Anal. Lett. v.7 Shimon,W.
  21. This Study was supported by research funds Chosun University