Speciation and preconcentration of inorganic tellurium from waters using a mercaptosilica microcolumn and determination by hydride generation atomic absorption spectrometry

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Korez A., Eroglu A., Volkan M., Ataman O.

JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY, vol.15, no.12, pp.1599-1605, 2000 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 15 Issue: 12
  • Publication Date: 2000
  • Doi Number: 10.1039/b004696p
  • Journal Name: JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1599-1605
  • Middle East Technical University Affiliated: Yes

Abstract

A separation-preconcentration method utilising a mercapto-modified silica microcolumn was developed for the determination of trace amounts of Te(rv) and Te(VI) in waters by hydride generation atomic absorption spectrometry. Bottled drinking water, tap water and sea-water samples were spiked with sub-ng ml(-1) concentrations of Te(IV) and the spiked solutions were subjected to the mercapto-modified silica microcolumn separation and enrichment procedure. The spike recovery values varied between 86 and 114%. In addition to spike recovery experiments, accuracy was also verified via the analysis of a certified reference material. The limit of detection for Te(nt) in sea-water with a preconcentration factor of 50 was 0.037 ng ml(-1). The capability of the microcolumn enrichment scheme for on-line sample processing via flow manifolds was demonstrated. A detailed interference study was performed.