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, vol.63, no.8, pp.856-860, 2008 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 63 Issue: 8
  • Publication Date: 2008
  • Doi Number: 10.1016/j.sab.2008,03.020
  • Journal Name: SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.856-860
  • Keywords: 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
  • Middle East Technical University Affiliated: Yes

Abstract

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.