A novel analytical system involving hydride generation and gold-coated W-coil trapping atomic absorption spectrometry for selenium determination at ng l(-1) level


Kula I., Arslan Y., Bakirdere S., ATAMAN O. Y.

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY, cilt.63, sa.8, ss.856-860, 2008 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 63 Sayı: 8
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.sab.2008,03.020
  • Dergi Adı: SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.856-860
  • Anahtar Kelimeler: gold-coated tungsten coil atom trap, selenium, atomic absorption spectrometry. hydride generation, MINIATURE ELECTROTHERMAL DEVICES, TUNGSTEN FILAMENT ATOMIZER, FORMING ELEMENTS, ONLINE PRECONCENTRATION, VAPOR GENERATION, COLLECTION, SE, ATOMIZATION, IRIDIUM, BLOOD
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

A novel analytical technique was developed where gaseous hydrogen selenide formed by sodium tetra hydrobora te reduction is transported to and trapped on a resistively heated gold-coated W-coil atom trap for in situ preconcentration. Gold coating on W-coil was prepared by using an organic solution of Au. The atom trap is held at 165 degrees C during the collection stage and is heated up to 675 degrees C for revolatilization; analyte species formed are transported to an externally heated quartz T-tube where the atornization takes place and the transient signal is obtained. The carrier gas consisted of 112.5 ml min' At with 75 ml min(-1) H(2) during the collection step and 112.5 ml min(-1) At with 450 ml min(-1) H(2) in the revolatilization step. The half width of the transient signal obtained is less than 0.5 s. The RSD for the measurements was found to be 3.9% (n = 11) for 0.10 mu g l(-1) Se using peak height measurements.