Cathodic stripping voltammetric determination of tellurium(IV) in chloride media using a Tosflex/8-quinolinol mercury film electrode

Hao Yun Yang, I-Wen Sun

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

A Tosflex/8-quinolinol (oxine) coated mercury film electrode (TOMFE) was developed for the determination of tellurium(IV) by square-wave cathodic voltammetry. The electrode is prepared by spin-coating a Tosflex/oxine solution onto the glassy carbon electrode surface. Subsequently, mercury is plated onto the electrode surface. Tellurium(IV) is preconcentrated, as TeCl2-6 in the chloride medium, onto the modified electrode by the ion-exchange effect of the Tosflex and the chelating effect of oxine. Good sensitivity was achieved through the catalytic process between oxine and tellurium. In comparison with the conventional mercury electrode, the TOMFE showed improved resistance to interferences from surface-active compounds on the determination of tellurium(IV). The interferences from metal ions, such as cadmium(II) and molybdenum(VI), which are capable of forming complexes with oxine were effectively eliminated by the addition of ethylenediamrnetetraacetate (EDTA) in the sample solution. The TOMFE is easy to prepare and chemically more stable than other anion-exchange polymer modified electrodes such as polyvinylpyridine modified mercury film electrode.

Original languageEnglish
Pages (from-to)195-200
Number of pages6
JournalElectroanalysis
Volume11
Issue number3
DOIs
Publication statusPublished - 1999 Jan 1

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Electrochemistry

Fingerprint

Dive into the research topics of 'Cathodic stripping voltammetric determination of tellurium(IV) in chloride media using a Tosflex/8-quinolinol mercury film electrode'. Together they form a unique fingerprint.

Cite this