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, cilt.15, sa.12, ss.1599-1605, 2000 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 12
  • Basım Tarihi: 2000
  • Doi Numarası: 10.1039/b004696p
  • Dergi Adı: JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1599-1605
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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.